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Prof. Dr. Michela Signoretto
Department of Molecular Sciences and Nano Systems,Università Ca’ Foscari Venezia, and INSTM Consortium, Via Torino 155,30172 Mestre Venezia, Italy

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0 mesoporous materials
0 Nanostructured materials
0 Industrial processes
0 Biomass valorization
0 Heterogeneous Catalysts

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Editorial
Published: 09 June 2021 in Processes
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This Special Issue of Processes on “Metal Nanoparticles as Catalysts for Green Applications” collects recent works of researchers on metal nanoparticles as catalysts for green applications

ACS Style

Michela Signoretto; Federica Menegazzo. Special Issue “Metal Nanoparticles as Catalysts for Green Applications”. Processes 2021, 9, 1015 .

AMA Style

Michela Signoretto, Federica Menegazzo. Special Issue “Metal Nanoparticles as Catalysts for Green Applications”. Processes. 2021; 9 (6):1015.

Chicago/Turabian Style

Michela Signoretto; Federica Menegazzo. 2021. "Special Issue “Metal Nanoparticles as Catalysts for Green Applications”." Processes 9, no. 6: 1015.

Journal article
Published: 31 December 2020 in Processes
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Ethanol steam reforming is one of the most promising ways to produce hydrogen from biomass, and the goal of this research is to investigate robust, selective and active catalysts for this reaction. In particular, this work is focused on the effect of the different ceria support preparation methods on the Ni active phase stabilization. Two synthetic approaches were evaluated: precipitation (with urea) and microemulsion. The effects of lanthanum doping were investigated too. All catalysts were characterized using N2-physisorption, temperature programmed reduction (TPR), XRD and SEM, to understand the influence of the synthetic approach on the morphological and structural features and their relationship with catalytic properties. Two synthesis methods gave strongly different features. Catalysts prepared by precipitation showed higher reducibility (which involves higher oxygen mobility) and a more homogeneous Ni particle size distribution. Catalytic tests (at 500 °C for 5 h using severe Gas Hourly Space Velocity conditions) revealed also different behaviors. Though the initial conversion (near complete) and H2 yield (60%, i.e., 3.6 mol H2/mol ethanol) were the same, the catalyst prepared by microemulsion was deactivated much faster. Similar trends were found for La-promoted supports. Catalyst deactivation was mainly related to coke deposition as was shown by SEM of the used samples. Higher reducibility of the catalysts prepared by the precipitation method led to a decrease in coke deposition rate by facilitating the removal of coke precursors, which made them the more stable catalysts of the reaction.

ACS Style

Cristina Pizzolitto; Federica Menegazzo; Elena Ghedini; Arturo Martínez Arias; Vicente Cortés Corberán; Michela Signoretto. Microemulsion vs. Precipitation: Which Is the Best Synthesis of Nickel–Ceria Catalysts for Ethanol Steam Reforming? Processes 2020, 9, 77 .

AMA Style

Cristina Pizzolitto, Federica Menegazzo, Elena Ghedini, Arturo Martínez Arias, Vicente Cortés Corberán, Michela Signoretto. Microemulsion vs. Precipitation: Which Is the Best Synthesis of Nickel–Ceria Catalysts for Ethanol Steam Reforming? Processes. 2020; 9 (1):77.

Chicago/Turabian Style

Cristina Pizzolitto; Federica Menegazzo; Elena Ghedini; Arturo Martínez Arias; Vicente Cortés Corberán; Michela Signoretto. 2020. "Microemulsion vs. Precipitation: Which Is the Best Synthesis of Nickel–Ceria Catalysts for Ethanol Steam Reforming?" Processes 9, no. 1: 77.

Research article
Published: 20 July 2020 in ACS Sustainable Chemistry & Engineering
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A series of mono- and bi-metallic metal catalysts (Pd, Cu, Fe, PdCu, PdFe) supported on ZrO2 (6-8 m) were synthesised and tested for the hydrogenation of bio-oil model compounds (furfural, vanillin, glucose) under 50 bar H2 at 100°C. The catalysts were fully characterised and their properties related to their catalytic activity. The bi-metallic PdFe and PdCu displayed enhanced catalytic performance compared to the monometallic catalysts for aldehyde hydrogenation (furfural, vanillin, glucose). For the best catalyst, 98% vanillin alcohol (VA) and 65.5% furfuryl alcohol (FA) conversion was obtained for 80 min batch-time. PdFe showed high selectivity towards sorbitol (74%) from glucose, though at low conversion (20%). Overall, we have demonstrated that bimetallic Fe and Cu based catalysts promoted by Pd show significantly better performance for the partial hydrogenation of bio-oil model compounds than the corresponding monometallic ones. The better performance of the Pd doped Fe/Cu catalysts is linked to the presence of smaller and better dispersed Pd nanoparticles (STEM) and their lower acidity (~90 µmol/g cat) than corresponding monometallic ones (~ 167 mol/g cat).

ACS Style

Giuseppe Bagnato; Michela Signoretto; Cristina Pizzolitto; Federica Menegazzo; Xiaoying Xi; Gert H. Ten Brink; Bart J. Kooi; Hero Jan Heeres; Aimaro Sanna. Hydrogenation of Biobased Aldehydes to Monoalcohols Using Bimetallic Catalysts. ACS Sustainable Chemistry & Engineering 2020, 8, 11994 -12004.

AMA Style

Giuseppe Bagnato, Michela Signoretto, Cristina Pizzolitto, Federica Menegazzo, Xiaoying Xi, Gert H. Ten Brink, Bart J. Kooi, Hero Jan Heeres, Aimaro Sanna. Hydrogenation of Biobased Aldehydes to Monoalcohols Using Bimetallic Catalysts. ACS Sustainable Chemistry & Engineering. 2020; 8 (32):11994-12004.

Chicago/Turabian Style

Giuseppe Bagnato; Michela Signoretto; Cristina Pizzolitto; Federica Menegazzo; Xiaoying Xi; Gert H. Ten Brink; Bart J. Kooi; Hero Jan Heeres; Aimaro Sanna. 2020. "Hydrogenation of Biobased Aldehydes to Monoalcohols Using Bimetallic Catalysts." ACS Sustainable Chemistry & Engineering 8, no. 32: 11994-12004.

Journal article
Published: 15 July 2020 in Processes
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The transformation of glucose into valuable biochemicals was carried out on different MCM-41-supported metallic and bimetallic (Co, Co-Fe, Co-Mn, Co-Mo) catalysts and under different reaction conditions (150 °C, 3 h; 200 °C, 0.5 h; 250 °C, 0.5 h). All catalysts were characterized using N2 physisorption, Temperature Programmed Reduction (TPR), Raman, X-ray Diffraction (XRD) and Temperature Programmed Desorption (TPD) techniques. According to the N2-physisorption results, a high surface area and mesoporous structure of the support were appropriate for metal dispersion, reactant diffusion and the formation of bioproducts. Reaction conditions, bimetals synergetic effects and the amount and strength of catalyst acid sites were the key factors affecting the catalytic activity and biochemical selectivity. Sever reaction conditions including high temperature and high catalyst acidity led to the formation mainly of solid humins. The NH3-TPD results demonstrated the alteration of acidity in different bimetallic catalysts. The 10Fe10CoSiO2 catalyst (MCM-41 supported 10 wt.%Fe, 10 wt.%Co) possessing weak acid sites displayed the best catalytic activity with the highest carbon balance and desired product selectivity in mild reaction condition. Valuable biochemicals such as fructose, levulinic acid, ethanol and hydroxyacetone were formed over this catalyst.

ACS Style

Somayeh Taghavi; Elena Ghedini; Federica Menegazzo; Michela Signoretto; Delia Gazzoli; Daniela Pietrogiacomi; Aisha Matayeva; Andrea Fasolini; Angelo Vaccari; Francesco Basile; Giuseppe Fornasari. MCM-41 Supported Co-based Bimetallic Catalysts for Aqueous Phase Transformation of Glucose to Biochemicals. Processes 2020, 8, 843 .

AMA Style

Somayeh Taghavi, Elena Ghedini, Federica Menegazzo, Michela Signoretto, Delia Gazzoli, Daniela Pietrogiacomi, Aisha Matayeva, Andrea Fasolini, Angelo Vaccari, Francesco Basile, Giuseppe Fornasari. MCM-41 Supported Co-based Bimetallic Catalysts for Aqueous Phase Transformation of Glucose to Biochemicals. Processes. 2020; 8 (7):843.

Chicago/Turabian Style

Somayeh Taghavi; Elena Ghedini; Federica Menegazzo; Michela Signoretto; Delia Gazzoli; Daniela Pietrogiacomi; Aisha Matayeva; Andrea Fasolini; Angelo Vaccari; Francesco Basile; Giuseppe Fornasari. 2020. "MCM-41 Supported Co-based Bimetallic Catalysts for Aqueous Phase Transformation of Glucose to Biochemicals." Processes 8, no. 7: 843.

Journal article
Published: 27 April 2020 in Catalysts
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Hydrogen production has been investigated through the photoreforming of glucose, as model molecule representative for biomass hydrolysis. Different copper- or nickel-loaded titania photocatalysts have been compared. The samples were prepared starting from three titania samples, prepared by precipitation and characterized by pure Anatase with high surface area, or prepared through flame synthesis, i.e., flame pyrolysis and the commercial P25, leading to mixed Rutile and Anatase phases with lower surface area. The metal was added in different loading up to 1 wt % following three procedures that induced different dispersion and reducibility to the catalyst. The highest activity among the bare semiconductors was exhibited by the commercial P25 titania, while the addition of 1 wt % CuO through precipitation with complexes led to the best hydrogen productivity, i.e., 9.7 mol H2/h kgcat. Finally, a basic economic analysis considering only the costs of the catalyst and testing was performed, suggesting CuO promoted samples as promising and almost feasible for this application.

ACS Style

Elnaz Bahadori; Gianguido Ramis; Danny Zanardo; Federica Menegazzo; Michela Signoretto; Delia Gazzoli; Daniela Pietrogiacomi; Alessandro Di Michele; Ilenia Rossetti. Photoreforming of Glucose over CuO/TiO2. Catalysts 2020, 10, 477 .

AMA Style

Elnaz Bahadori, Gianguido Ramis, Danny Zanardo, Federica Menegazzo, Michela Signoretto, Delia Gazzoli, Daniela Pietrogiacomi, Alessandro Di Michele, Ilenia Rossetti. Photoreforming of Glucose over CuO/TiO2. Catalysts. 2020; 10 (5):477.

Chicago/Turabian Style

Elnaz Bahadori; Gianguido Ramis; Danny Zanardo; Federica Menegazzo; Michela Signoretto; Delia Gazzoli; Daniela Pietrogiacomi; Alessandro Di Michele; Ilenia Rossetti. 2020. "Photoreforming of Glucose over CuO/TiO2." Catalysts 10, no. 5: 477.

Journal article
Published: 20 November 2019 in Molecules
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This work deals with the formulation of environmentally friendly, cheap, and readily-available materials for green building applications, providing the function of air purificator by improving the safety and the comfort of an indoor environment. High surface area TiO2–SiO2 samples, prepared by a simple, cost effective, and scalable synthetic approach, proved to be effective in maximizing the properties of each component, i.e., the photocatalytic properties of titania and the high surface area of silica. TiO2 was introduced onto an ordered mesoporous silica Santa Barbara Amorphous-15 (SBA-15), that is featured by interesting insulating features, by using an incipient wetness impregnation method. The photocatalytic activity was evaluated in gas phase oxidation of ethylbenzene, which was selected as model volatile organic compound (VOC) molecule. The morphological, textural and structural features along with the electronic properties, the hydrophilicity and heat capacity of the materials were investigated in depth by scanning electron microscopy, powder X-ray diffraction, N2 physisorption, diffuse reflectance UV-Vis, FT-IR spectroscopies, and modulated DSC (MDSC) dynamic scan. Outstanding performances in the ethylbenzene abatement results are promising for further application in the green building sector.

ACS Style

Elena Ghedini; Federica Menegazzo; Maela Manzoli; Alessandro Di Michele; Debora Puglia; Michela Signoretto; Di Michele. Multifunctional and Environmentally Friendly TiO2–SiO2 Mesoporous Materials for Sustainable Green Buildings. Molecules 2019, 24, 4226 .

AMA Style

Elena Ghedini, Federica Menegazzo, Maela Manzoli, Alessandro Di Michele, Debora Puglia, Michela Signoretto, Di Michele. Multifunctional and Environmentally Friendly TiO2–SiO2 Mesoporous Materials for Sustainable Green Buildings. Molecules. 2019; 24 (23):4226.

Chicago/Turabian Style

Elena Ghedini; Federica Menegazzo; Maela Manzoli; Alessandro Di Michele; Debora Puglia; Michela Signoretto; Di Michele. 2019. "Multifunctional and Environmentally Friendly TiO2–SiO2 Mesoporous Materials for Sustainable Green Buildings." Molecules 24, no. 23: 4226.

Journal article
Published: 15 November 2019 in Catalysis Today
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Valorisation of lignocellulosic biomass for chemical production is one of the main challenges of the 21st century. Levulinic acid (LA) has been chosen as the target product due to its potential as an intermediate to produce a wide variety of other chemicals. The attention has been focused on the formulation of an active solid acid catalyst for the hydrolysis of glucose to LA. Therefore, a deep modification of SBA-15 with sulfonic groups was performed using post-synthesis grafting method. In particular, this work focuses on the role of different grafting solvents. Since the traditional solvents such as toluene or hexane, are flammable and toxic, a safer and more environmentally friendly solvent, a mixture of water and NaCl has been investigated. It was found that the nature of the solvent highly affects the morphological and chemical features of the materials. Thus, the best catalytic results were obtained with the catalyst prepared in water and NaCl; indeed 30 % and 16 % of LA yield were obtained from fructose and glucose hydrolysis at 180 °C respectively. Water and NaCl mixture guarantees the best distribution of sulfonic groups over the surface, leading to the most balanced acid catalyst.

ACS Style

Cristina Pizzolitto; Elena Ghedini; Federica Menegazzo; Michela Signoretto; Alessia Giordana; Giuseppina Cerrato; Giuseppe Cruciani. Effect of grafting solvent in the optimisation of Sba-15 acidity for levulinIc acid production. Catalysis Today 2019, 345, 183 -189.

AMA Style

Cristina Pizzolitto, Elena Ghedini, Federica Menegazzo, Michela Signoretto, Alessia Giordana, Giuseppina Cerrato, Giuseppe Cruciani. Effect of grafting solvent in the optimisation of Sba-15 acidity for levulinIc acid production. Catalysis Today. 2019; 345 ():183-189.

Chicago/Turabian Style

Cristina Pizzolitto; Elena Ghedini; Federica Menegazzo; Michela Signoretto; Alessia Giordana; Giuseppina Cerrato; Giuseppe Cruciani. 2019. "Effect of grafting solvent in the optimisation of Sba-15 acidity for levulinIc acid production." Catalysis Today 345, no. : 183-189.

Journal article
Published: 08 November 2019 in Journal of CO2 Utilization
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CO2 photoreduction with water to obtain solar fuels is one of the most innovative and sustainable processes to harvest light energy and convert it into hydrocarbons. Although photocatalytically active materials and photoreactors have been developed for this purpose, lack of standardisation in testing conditions makes the assessment of process parameters and the comparison of material performance a challenge. Therefore, this paper is aimed at investigating the effect of CO2 photoreduction parameters irradiance and reaction time on production of methane from two photocatalytic rigs. This was pursued through a design of experiments (DOE) approach, which assessed the influence of experimental conditions between different setups. Using low irradiance (40–60 W m−2), reaction time and temperature significantly affected methane production, with a maximum production of 28.50 μmol gcat−1 (40 W m−2, 4 h). When using high irradiance (60–2400 W m−2), only irradiance was found to significantly affect methane production, with a maximum production of 1.90 ∙ 10−1 μmol gcat−1 (1240 W m−2, 2 h). Considering proposed reaction mechanism for CO2 photoreduction, this paper highlights that experimental results give different yet complementary information on the two most important steps of the process, i.e. photoexcitation and surface chemical reaction.

ACS Style

Alberto Olivo; Warren Thompson; Elizabeth Bay; Elena Ghedini; Federica Menegazzo; Mercedes Maroto-Valer; Michela Signoretto. Investigation of process parameters assessment via design of experiments for CO2 photoreduction in two photoreactors. Journal of CO2 Utilization 2019, 36, 25 -32.

AMA Style

Alberto Olivo, Warren Thompson, Elizabeth Bay, Elena Ghedini, Federica Menegazzo, Mercedes Maroto-Valer, Michela Signoretto. Investigation of process parameters assessment via design of experiments for CO2 photoreduction in two photoreactors. Journal of CO2 Utilization. 2019; 36 ():25-32.

Chicago/Turabian Style

Alberto Olivo; Warren Thompson; Elizabeth Bay; Elena Ghedini; Federica Menegazzo; Mercedes Maroto-Valer; Michela Signoretto. 2019. "Investigation of process parameters assessment via design of experiments for CO2 photoreduction in two photoreactors." Journal of CO2 Utilization 36, no. : 25-32.

Journal article
Published: 31 October 2019 in Journal of Catalysis
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Microwave (MW) -assisted levulinic acid (LA) hydrogenation has been performed over two gold catalysts (commercial 1 wt% Au/TiO2 by AUROlite™ and 2.5 wt% Au/ZrO2, prepared using deposition-precipitation). MW-assisted LA hydrogenation was carried out in water and in solvent-free conditions via (i) H-transfer and (ii) molecular H2. Au/TiO2 promoted complete LA conversion and the further reduction of the produced GVL to 1,4-pentanediol (1,4-PDO) in the presence of 50 bar H2 at 150 °C (4-hour reaction). Interestingly, selectivity to 1,4-PDO was complete at 200 °C. Extended characterisation highlighted the cooperative role played by the gold nanoparticles and the support, onto which activated hydrogen atoms spillover to react with LA. This results in the remarkable activity of Au/TiO2. Both catalysts showed structural and morphological stability under reaction conditions. It was possible to reactivate the Au/TiO2 catalyst by MW-assisted oxidation, paving the way for catalyst recycling directly inside the MW reactor.

ACS Style

Fabio Bucciol; S. Tabasso; Giorgio Grillo; F. Menegazzo; M. Signoretto; M. Manzoli; G. Cravotto. Boosting levulinic acid hydrogenation to value-added 1,4-pentanediol using microwave-assisted gold catalysis. Journal of Catalysis 2019, 380, 267 -277.

AMA Style

Fabio Bucciol, S. Tabasso, Giorgio Grillo, F. Menegazzo, M. Signoretto, M. Manzoli, G. Cravotto. Boosting levulinic acid hydrogenation to value-added 1,4-pentanediol using microwave-assisted gold catalysis. Journal of Catalysis. 2019; 380 ():267-277.

Chicago/Turabian Style

Fabio Bucciol; S. Tabasso; Giorgio Grillo; F. Menegazzo; M. Signoretto; M. Manzoli; G. Cravotto. 2019. "Boosting levulinic acid hydrogenation to value-added 1,4-pentanediol using microwave-assisted gold catalysis." Journal of Catalysis 380, no. : 267-277.

Journal article
Published: 04 October 2019 in International Journal of Hydrogen Energy
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Methane dry reforming (MDR) is a promising process for syngas production through the valorisation of two of the main Greenhouse gases. Despite the high endothermicity, it should be carried out at low temperature to directly use the syngas for Fischer-Tropsch reaction and oxygenated chemical production. The catalyst plays a key role in this process as it must encourage syngas formation by limiting coke deactivation. This work focusses the attention on the effect of different supports in the activity and stability of nickel-based catalysts. In particular, MDR has been studied at relatively low temperature, 500 °C, to deeply investigate how the support influences the reaction pathway. Ceria, zirconia, alumina, silica and titania were considered and the morphological and structural features of the materials were analysed via N2-physisorption, AAS, TPR, XRD, CO2-TPD, and SEM techniques. Moreover, by analysing the spent catalysts, it was possible to identify the causes of catalysts deactivation. Titania based catalyst is not active for MDR, while silica and zirconia present moderated activity due to the poor support stability. Most promising results are obtained with ceria and alumina-based catalysts; for these materials, 70-h reaction was carried out and alumina catalyst has proved to be the most stable towards MDR at low reaction temperature with a stable H2 yield of 25% .

ACS Style

Cristina Pizzolitto; Eva Pupulin; Federica Menegazzo; Elena Ghedini; Alessandro Di Michele; Maurizio Mattarelli; Giuseppe Cruciani; Michela Signoretto. Nickel based catalysts for methane dry reforming: Effect of supports on catalytic activity and stability. International Journal of Hydrogen Energy 2019, 44, 28065 -28076.

AMA Style

Cristina Pizzolitto, Eva Pupulin, Federica Menegazzo, Elena Ghedini, Alessandro Di Michele, Maurizio Mattarelli, Giuseppe Cruciani, Michela Signoretto. Nickel based catalysts for methane dry reforming: Effect of supports on catalytic activity and stability. International Journal of Hydrogen Energy. 2019; 44 (52):28065-28076.

Chicago/Turabian Style

Cristina Pizzolitto; Eva Pupulin; Federica Menegazzo; Elena Ghedini; Alessandro Di Michele; Maurizio Mattarelli; Giuseppe Cruciani; Michela Signoretto. 2019. "Nickel based catalysts for methane dry reforming: Effect of supports on catalytic activity and stability." International Journal of Hydrogen Energy 44, no. 52: 28065-28076.

Journal article
Published: 23 September 2019 in Materials
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Light-driven processes can be regarded as a promising technology for chemical production within the bio-refinery concept, due to the very mild operative conditions and high selectivity of some reactions. In this work, we report copper oxide (CuO)-titanium dioxide (TiO2) nanocomposites to be efficient and selective photocatalysts for ethanol photodehydrogenation under gas phase conditions, affording 12-fold activity improvement compared to bare TiO2. In particular, the insertion method of the CuO co-catalyst in different TiO2 materials and its effects on the photocatalytic activity were studied. The most active CuO co-catalyst was observed to be highly dispersed on titania surface, and highly reducible. Moreover, such high dispersion was observed to passivate some surface sites where ethanol is strongly adsorbed, thus improving the activity. This kind of material can be obtained by the proper selection of loading technique for both co-catalysts, allowing a higher coverage of photocatalyst surface (complex-precipitation in the present work), and the choice of titania material itself. Loading copper on a high surface area titania was observed to afford a limited ethanol conversion, due to its intrinsically higher reactivity affording to a strong interaction with the co-catalyst.

ACS Style

Danny Zanardo; Elena Ghedini; Federica Menegazzo; Elti Cattaruzza; Maela Manzoli; Giuseppe Cruciani; Michela Signoretto. Titanium Dioxide-Based Nanocomposites for Enhanced Gas-Phase Photodehydrogenation. Materials 2019, 12, 3093 .

AMA Style

Danny Zanardo, Elena Ghedini, Federica Menegazzo, Elti Cattaruzza, Maela Manzoli, Giuseppe Cruciani, Michela Signoretto. Titanium Dioxide-Based Nanocomposites for Enhanced Gas-Phase Photodehydrogenation. Materials. 2019; 12 (19):3093.

Chicago/Turabian Style

Danny Zanardo; Elena Ghedini; Federica Menegazzo; Elti Cattaruzza; Maela Manzoli; Giuseppe Cruciani; Michela Signoretto. 2019. "Titanium Dioxide-Based Nanocomposites for Enhanced Gas-Phase Photodehydrogenation." Materials 12, no. 19: 3093.

Review
Published: 30 July 2019 in Molecules
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Catalytic conversion of actual biomass to valuable chemicals is a crucial issue in green chemistry. This review discusses on the recent approach in the levulinic acid (LA) formation from three prominent generations of biomasses. Our paper highlights the impact of the nature of different types of biomass and their complex structure and impurities, different groups of catalyst, solvents, and reaction system, and condition and all related pros and cons for this process.

ACS Style

Michela Signoretto; Somayeh Taghavi; Elena Ghedini; Federica Menegazzo. Catalytic Production of Levulinic Acid (LA) from Actual Biomass. Molecules 2019, 24, 2760 .

AMA Style

Michela Signoretto, Somayeh Taghavi, Elena Ghedini, Federica Menegazzo. Catalytic Production of Levulinic Acid (LA) from Actual Biomass. Molecules. 2019; 24 (15):2760.

Chicago/Turabian Style

Michela Signoretto; Somayeh Taghavi; Elena Ghedini; Federica Menegazzo. 2019. "Catalytic Production of Levulinic Acid (LA) from Actual Biomass." Molecules 24, no. 15: 2760.

Journal article
Published: 12 July 2019 in RSC Advances
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A novel example using a systematic design of experiments mixture design for developing mixed metal oxide photocatalysts for CO2 photoreduction.

ACS Style

Warren A. Thompson; Alberto Olivo; Danny Zanardo; Giuseppe Cruciani; Federica Menegazzo; Michela Signoretto; Mercedes Maroto-Valer. Systematic study of TiO2/ZnO mixed metal oxides for CO2 photoreduction. RSC Advances 2019, 9, 21660 -21666.

AMA Style

Warren A. Thompson, Alberto Olivo, Danny Zanardo, Giuseppe Cruciani, Federica Menegazzo, Michela Signoretto, Mercedes Maroto-Valer. Systematic study of TiO2/ZnO mixed metal oxides for CO2 photoreduction. RSC Advances. 2019; 9 (38):21660-21666.

Chicago/Turabian Style

Warren A. Thompson; Alberto Olivo; Danny Zanardo; Giuseppe Cruciani; Federica Menegazzo; Michela Signoretto; Mercedes Maroto-Valer. 2019. "Systematic study of TiO2/ZnO mixed metal oxides for CO2 photoreduction." RSC Advances 9, no. 38: 21660-21666.

Journal article
Published: 25 April 2019 in Applied Catalysis A: General
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Hydrodeoxygenation (HDO) of isoeugenol has been investigated over Ni-SBA-15 and Ni-SZ-SBA-15 containing sulfated ZrO2 with Si/Zr molar ratio of 8.4. The catalysts were prepared via incipient wetness method and characterized by N2 adsorption, AAS, TPR, X-ray diffraction (XRD), thermal gravimetric/differential thermal analyses (TG-DTA), organic elemental analysis, pyridine adsorption-desorption with Fourier-transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). The results revealed that 75% yield of propylcyclohexane was obtained over a non acidic Ni-SBA-15 in isoeugenol HDO at 300 °C under 3 MPa H2 using dodecane as a solvent. Ni-SZ-SBA-15 gave only very low HDO activity, which is explained by location of the acid sites both inside and outside SBA-15, whereas nickel particles were partially located inside the SBA-15 structure. On the other hand Ni particles in Ni-SBA-15 with the size of 20 nm were located outside SBA-15 promoting HDO. The kinetic model was developed for HDO of isoeugenol based on the proposed reaction network, which took into account formation of intermediate products as well as oligomers. The developed kinetic model was capable of describing well the experimental data with the degree of explanation equal to 91%. The activation energy for hydrogenation of propylcyclohexene and for demethoxylation of dihydroeugenol to 4-propylphenol are equal to 92 kJ/mol and 62 kJ/mol, respectively.

ACS Style

Sebastiano Tieuli; Päivi Mäki-Arvela; Markus Peurla; Kari Eränen; Johan Wärnå; Giuseppe Cruciani; Federica Menegazzo; Dmitry Yu. Murzin; Michela Signoretto. Hydrodeoxygenation of isoeugenol over Ni-SBA-15: Kinetics and modelling. Applied Catalysis A: General 2019, 580, 1 -10.

AMA Style

Sebastiano Tieuli, Päivi Mäki-Arvela, Markus Peurla, Kari Eränen, Johan Wärnå, Giuseppe Cruciani, Federica Menegazzo, Dmitry Yu. Murzin, Michela Signoretto. Hydrodeoxygenation of isoeugenol over Ni-SBA-15: Kinetics and modelling. Applied Catalysis A: General. 2019; 580 ():1-10.

Chicago/Turabian Style

Sebastiano Tieuli; Päivi Mäki-Arvela; Markus Peurla; Kari Eränen; Johan Wärnå; Giuseppe Cruciani; Federica Menegazzo; Dmitry Yu. Murzin; Michela Signoretto. 2019. "Hydrodeoxygenation of isoeugenol over Ni-SBA-15: Kinetics and modelling." Applied Catalysis A: General 580, no. : 1-10.

Journal article
Published: 25 March 2019 in International Journal of Hydrogen Energy
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The effects of nitrogen functional groups on graphene surface and also the effects of cobalt loading and ruthenium promoter on the performance of nitrogen functionalized graphene nanosheets (N-GNS) supported cobalt catalysts in Fischer–Tropsch synthesis (FTS) are investigated. A 15 wt% Co/PGNS catalyst, a series of Co/N-GNS (15–30 wt% loading) and ruthenium promoted catalysts (25 wt% Co,0.5 wt% Ru/N-GNS and 25 wt% Co,0.5 wt% Ru/PGNS) were prepared by impregnation method. The purified GNS and functionalized GNS and all catalysts were characterized by Raman spectroscopy, FTIR, SEM, EDS, ICP, BET, TEM, XRD and TPR. The catalysts assessed in FTS in a fixed bed micro-reactor at 220 °C, 1.8 Mpa and H2/CO ratio of 2. Functionalization of GNS shifted the TPR reduction peaks to lower temperature, increased the dispersion of cobalt particles and increased the percentage CO conversion from 70.6% to 74.5%. Increasing the cobalt loading resulted in increasing the average cobalt cluster size, improvements in the reducibility of Co3O4. The maximum FTS activity for N-GNS supported catalyst is achieved at 30 wt % cobalt loading. The C5+ selectivity for the 30 wt % cobalt catalyst was higher than that of the 15 wt % Cobalt catalyst. Addition of 0.5 wt%Ru increased the FTS rate (gCH/(gcat·h)) from 0.377 to 0.412 and the liquid products selectivity from 86.5% to 91.2%.

ACS Style

Somayeh Taghavi; Ahmad Tavasoli; Alireza Asghari; Michela Signoretto. Loading and promoter effects on the performance of nitrogen functionalized graphene nanosheets supported cobalt Fischer-Tropsch synthesis catalysts. International Journal of Hydrogen Energy 2019, 44, 10604 -10615.

AMA Style

Somayeh Taghavi, Ahmad Tavasoli, Alireza Asghari, Michela Signoretto. Loading and promoter effects on the performance of nitrogen functionalized graphene nanosheets supported cobalt Fischer-Tropsch synthesis catalysts. International Journal of Hydrogen Energy. 2019; 44 (21):10604-10615.

Chicago/Turabian Style

Somayeh Taghavi; Ahmad Tavasoli; Alireza Asghari; Michela Signoretto. 2019. "Loading and promoter effects on the performance of nitrogen functionalized graphene nanosheets supported cobalt Fischer-Tropsch synthesis catalysts." International Journal of Hydrogen Energy 44, no. 21: 10604-10615.

Review
Published: 11 March 2019 in Catalysts
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The reaction between hydrogen and oxygen is in principle the simplest method to form hydrogen peroxide, but it is still a “dream process”, thus needing a “dream catalyst”. The aim of this review is to analyze critically the different heterogeneous catalysts used for the direct synthesis of H2O2 trying to determine the features that the ideal or “dream catalyst” should possess. This analysis will refer specifically to the following points: (i) the choice of the metal; (ii) the metal promoters used to improve the activity and/or the selectivity; (iii) the role of different supports and their acidic properties; (iv) the addition of halide promoters to inhibit undesired side reactions; (v) the addition of other promoters; (vi) the effects of particle morphology; and (vii) the effects of different synthetic methods on catalyst morphology and performance.

ACS Style

Federica Menegazzo; Michela Signoretto; Elena Ghedini; Giorgio Strukul. Looking for the “Dream Catalyst” for Hydrogen Peroxide Production from Hydrogen and Oxygen. Catalysts 2019, 9, 251 .

AMA Style

Federica Menegazzo, Michela Signoretto, Elena Ghedini, Giorgio Strukul. Looking for the “Dream Catalyst” for Hydrogen Peroxide Production from Hydrogen and Oxygen. Catalysts. 2019; 9 (3):251.

Chicago/Turabian Style

Federica Menegazzo; Michela Signoretto; Elena Ghedini; Giorgio Strukul. 2019. "Looking for the “Dream Catalyst” for Hydrogen Peroxide Production from Hydrogen and Oxygen." Catalysts 9, no. 3: 251.

Journal article
Published: 07 November 2018 in C
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Methane dry reforming (MDR) allows the transformation of carbon dioxide and methane, the two main greenhouse gases, into syngas. Given the high endothermicity of the process, it is necessary to produce a catalytic system that is very active, selective and resistant to coking deactivation; this work focuses on the development of a heterogeneous catalyst based on nickel supported on cerium oxide. Several strategies of synthesis of the catalysts were studied with particular attention to the lanthanum addition methodology. Both supports and catalysts, fresh and used, were deeply characterized by different techniques (N2 physisorption, TPR, XRD, SEM). The effect of temperature on activity and selectivity of the different catalysts was also studied. A positive effect of lanthanum addition is strongly related to the synthetic methodology. Incipient wetness impregnation of lanthanum precursor on an already calcined ceria has led to the best catalytic activity. This behaviour is due to a more effective interaction between nickel and the support, which results in a higher dispersion of the active phase. The structural modifications have led to an improvement of the redox pump of the ceria, reducing the formation of coke during the reaction and improving the stability on time on stream.

ACS Style

Federica Menegazzo; Cristina Pizzolitto; Elena Ghedini; Alessandro Di Michele; Giuseppe Cruciani; Michela Signoretto. Development of La Doped Ni/CeO2 for CH4/CO2 Reforming. C 2018, 4, 60 .

AMA Style

Federica Menegazzo, Cristina Pizzolitto, Elena Ghedini, Alessandro Di Michele, Giuseppe Cruciani, Michela Signoretto. Development of La Doped Ni/CeO2 for CH4/CO2 Reforming. C. 2018; 4 (4):60.

Chicago/Turabian Style

Federica Menegazzo; Cristina Pizzolitto; Elena Ghedini; Alessandro Di Michele; Giuseppe Cruciani; Michela Signoretto. 2018. "Development of La Doped Ni/CeO2 for CH4/CO2 Reforming." C 4, no. 4: 60.

Research article
Published: 04 October 2018 in ACS Sustainable Chemistry & Engineering
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The effects of lanthanum addition in Ni/CeO2 catalysts were investigated. The influence of synthetic procedures, namely impregnation or co-precipitation of lanthanum and cerium oxide, were evaluated. Materials were analyzed by BET, AAS, DRIFT-MS, TPR, OSC, XRD and SEM-EDX. Samples were tested in Ethanol Steam Reforming (ESR). Both lanthanum-promoted samples exhibited a higher stability in time than non-promoted catalyst. Nonetheless, catalytic behavior is strongly affected by the preparation method. TPR, OSC and XRD analyses showed that co-precipitation method allowed the best interaction between ceria and lanthana, leading to an increased redox ability and best catalytic performances as a result. A catalyst with a support prepared via co-precipitation method showed ethanol conversion of 90% and hydrogen selectivity higher than 70% even after 60 hours of reaction.

ACS Style

Cristina Pizzolitto; Federica Menegazzo; Elena Ghedini; Giada Innocenti; Alessandro Di Michele; Giuseppe Cruciani; Fabrizio Cavani; Michela Signoretto. Increase of Ceria Redox Ability by Lanthanum Addition on Ni Based Catalysts for Hydrogen Production. ACS Sustainable Chemistry & Engineering 2018, 6, 13867 -13876.

AMA Style

Cristina Pizzolitto, Federica Menegazzo, Elena Ghedini, Giada Innocenti, Alessandro Di Michele, Giuseppe Cruciani, Fabrizio Cavani, Michela Signoretto. Increase of Ceria Redox Ability by Lanthanum Addition on Ni Based Catalysts for Hydrogen Production. ACS Sustainable Chemistry & Engineering. 2018; 6 (11):13867-13876.

Chicago/Turabian Style

Cristina Pizzolitto; Federica Menegazzo; Elena Ghedini; Giada Innocenti; Alessandro Di Michele; Giuseppe Cruciani; Fabrizio Cavani; Michela Signoretto. 2018. "Increase of Ceria Redox Ability by Lanthanum Addition on Ni Based Catalysts for Hydrogen Production." ACS Sustainable Chemistry & Engineering 6, no. 11: 13867-13876.

Journal article
Published: 03 October 2018 in International Journal of Hydrogen Energy
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This study investigated the catalytic behavior of two different types of materials: (i) algal biochar and (ii) 15 wt% Ni impregnated on SBA-15 support (Ni/SBA-15), in the thermochemical decomposition of Venice lagoon brown marine algae (Sargassum). First, non-catalytic pyrolysis tests were conducted in a temperature range of 400–800 °C in a dual-bed slow pyrolysis reactor. The optimum temperature for maximized liquid yield was at the temperature of 700 °C. Biochar catalyst exhibited excellent catalytic activity toward producing aromatic compounds via Diels-Alder-type reactions. However, Ni/SBA-15, because of interconnected pores provided easy passage for reactant and product during the catalytic pyrolysis process and resulted in an improvement in total gas yield (25.87 mmol/g Sargassum) and hydrogen-rich gas production (8.54 mmol/g Sargassum). The catalytic performances of both biochar and Ni/SBA-15 catalysts were compared to biochar-based catalysts derived from red and green macroalgae. High specific surface area, large pore volume, highly ordered pore structure, and narrow pore size distribution make SBA-15 a promising catalyst support in pyrolysis of biomass.

ACS Style

Somayeh Taghavi; Omid Norouzi; Ahmad Tavasoli; Francesco Di Maria; Michela Signoretto; Federica Menegazzo; Alessandro Di Michele. Catalytic conversion of Venice lagoon brown marine algae for producing hydrogen-rich gas and valuable biochemical using algal biochar and Ni/SBA-15 catalyst. International Journal of Hydrogen Energy 2018, 43, 19918 -19929.

AMA Style

Somayeh Taghavi, Omid Norouzi, Ahmad Tavasoli, Francesco Di Maria, Michela Signoretto, Federica Menegazzo, Alessandro Di Michele. Catalytic conversion of Venice lagoon brown marine algae for producing hydrogen-rich gas and valuable biochemical using algal biochar and Ni/SBA-15 catalyst. International Journal of Hydrogen Energy. 2018; 43 (43):19918-19929.

Chicago/Turabian Style

Somayeh Taghavi; Omid Norouzi; Ahmad Tavasoli; Francesco Di Maria; Michela Signoretto; Federica Menegazzo; Alessandro Di Michele. 2018. "Catalytic conversion of Venice lagoon brown marine algae for producing hydrogen-rich gas and valuable biochemical using algal biochar and Ni/SBA-15 catalyst." International Journal of Hydrogen Energy 43, no. 43: 19918-19929.

Review
Published: 04 September 2018 in ChemEngineering
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The development of sustainable yet efficient technologies to store solar light into high energy molecules, such as hydrocarbons and hydrogen, is a pivotal challenge in 21st century society. In the field of photocatalysis, a wide variety of chemical routes can be pursued to obtain solar fuels but the two most promising are carbon dioxide photoreduction and photoreforming of biomass-derived substrates. Despite their great potentialities, these technologies still need to be improved to represent a reliable alternative to traditional fuels, in terms of both catalyst design and photoreactor engineering. This review highlights the chemical fundamentals of different photocatalytic reactions for solar fuels production and provides a mechanistic insight on proposed reaction pathways. Also, possible cutting-edge strategies to obtain solar fuels are reported, focusing on how the chemical bases of the investigated reaction affect experimental choices.

ACS Style

Alberto Olivo; Danny Zanardo; Elena Ghedini; Federica Menegazzo; Michela Signoretto. Solar Fuels by Heterogeneous Photocatalysis: From Understanding Chemical Bases to Process Development. ChemEngineering 2018, 2, 42 .

AMA Style

Alberto Olivo, Danny Zanardo, Elena Ghedini, Federica Menegazzo, Michela Signoretto. Solar Fuels by Heterogeneous Photocatalysis: From Understanding Chemical Bases to Process Development. ChemEngineering. 2018; 2 (3):42.

Chicago/Turabian Style

Alberto Olivo; Danny Zanardo; Elena Ghedini; Federica Menegazzo; Michela Signoretto. 2018. "Solar Fuels by Heterogeneous Photocatalysis: From Understanding Chemical Bases to Process Development." ChemEngineering 2, no. 3: 42.