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Dr. Julio Cruz
Instituto Tecnológico de Chetumal. Chetumal, Quintana Roo, Mexico

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Journal article
Published: 23 September 2020 in International Journal of Hydrogen Energy
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In this research work a blend based on sulfonated poly (ether-ether ketone) (SPEEK) and chitosan was synthesized and characterized as ion-exchange membrane. The material was prepared at different ratio of chitosan: 1, 5 and 10% and characterized by several physicochemical and mechanical techniques. Also, water uptake, dimensional changes (swelling), ion exchange capacity (IEC) and proton conductivity (σH+) were evaluated. The best SPEEK|Chitosan membrane ratio (S-CS 10%, according with proton effective mobility) was tested in a proton exchange fuel cell (PEMFC) as activation method at 37.5 °C, 100% RH, 3 bar (abs). Then, electrochemical hydrogen pumping (EHP) was tested, where 1796 mA cm−2 of limit current density at 1 V, 37.5 °C, 100% RH and 1 bar (abs) was measured by linear swept voltammetry at 50 mV s−1, low hydrogen crossover (even one order of magnitude less than commercial Nafion® membrane) and was possible hydrogen pumping at 600 mA cm−2 with 0.15 V for 1 h without any overheating caused by the applied current.

ACS Style

A. Rico-Zavala; M.V. Contreras-Martínez; I. Murillo-Borbonio; J.C. Cruz; F.I. Espinosa-Lagunes; M.P. Gurrola; L.G. Arriaga; J. Ledesma-García. Organic composite membrane for hydrogen electrochemical conversion devices. International Journal of Hydrogen Energy 2020, 45, 32493 -32507.

AMA Style

A. Rico-Zavala, M.V. Contreras-Martínez, I. Murillo-Borbonio, J.C. Cruz, F.I. Espinosa-Lagunes, M.P. Gurrola, L.G. Arriaga, J. Ledesma-García. Organic composite membrane for hydrogen electrochemical conversion devices. International Journal of Hydrogen Energy. 2020; 45 (56):32493-32507.

Chicago/Turabian Style

A. Rico-Zavala; M.V. Contreras-Martínez; I. Murillo-Borbonio; J.C. Cruz; F.I. Espinosa-Lagunes; M.P. Gurrola; L.G. Arriaga; J. Ledesma-García. 2020. "Organic composite membrane for hydrogen electrochemical conversion devices." International Journal of Hydrogen Energy 45, no. 56: 32493-32507.

Journal article
Published: 31 December 2019 in Revista de Ingeniería Civil
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In the present work we analyze the properties of a mortar with the addition of treated sargassum algae, replacing the stone aggregate in percentages of 5%, 10%, 15% and 20% in order to reduce the thermal conductivity of the coating and the thermal load of the interior of the buildings, thus reducing energy consumption and implementing sustainable materials to the construction industry. For the purposes of this investigation, a characterization of the components of the mortar was carried out, the stone aggregate and the sargassum treated for its use as an aggregate. Samples were prepared for each percentage and compression resistance tests were performed at 3, 7, 14 and 28 days to analyze the behavior of the mortar during the hardening process. Adhesion tests were performed to determine if the mixtures are efficient for use as a coating. Subsequently, the thermal transfer was evaluated by conduction and convection. The material showed hydrophilic characteristics, therefore, the analysis of the mechanical properties showed as bigger substitution of sargassum, low is the resistance, limiting the efficient percentages to 5 and 10% for its use.

ACS Style

Alberto Zavala-Arceo; Julio César Cruz-Argüello; Mayra Zyzlila Figueroa-Torres; Alberto Yeladaqui-Tello. Determinación de las propiedades térmicas de un mortero modificado con sargazo como material alternativo en construcción. Revista de Ingeniería Civil 2019, 1 -9.

AMA Style

Alberto Zavala-Arceo, Julio César Cruz-Argüello, Mayra Zyzlila Figueroa-Torres, Alberto Yeladaqui-Tello. Determinación de las propiedades térmicas de un mortero modificado con sargazo como material alternativo en construcción. Revista de Ingeniería Civil. 2019; ():1-9.

Chicago/Turabian Style

Alberto Zavala-Arceo; Julio César Cruz-Argüello; Mayra Zyzlila Figueroa-Torres; Alberto Yeladaqui-Tello. 2019. "Determinación de las propiedades térmicas de un mortero modificado con sargazo como material alternativo en construcción." Revista de Ingeniería Civil , no. : 1-9.

Review
Published: 26 November 2019 in Sustainability
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ACS Style

Blandy Pamplona Solis; Julio César Cruz Argüello; Leopoldo Gómez Barba; Mayra Polett Gurrola; Zakaryaa Zarhri; Danna Lizeth Trejo-Arroyo. Bibliometric Analysis of the Mass Transport in a Gas Diffusion Layer in PEM Fuel Cells. Sustainability 2019, 1 .

AMA Style

Blandy Pamplona Solis, Julio César Cruz Argüello, Leopoldo Gómez Barba, Mayra Polett Gurrola, Zakaryaa Zarhri, Danna Lizeth Trejo-Arroyo. Bibliometric Analysis of the Mass Transport in a Gas Diffusion Layer in PEM Fuel Cells. Sustainability. 2019; ():1.

Chicago/Turabian Style

Blandy Pamplona Solis; Julio César Cruz Argüello; Leopoldo Gómez Barba; Mayra Polett Gurrola; Zakaryaa Zarhri; Danna Lizeth Trejo-Arroyo. 2019. "Bibliometric Analysis of the Mass Transport in a Gas Diffusion Layer in PEM Fuel Cells." Sustainability , no. : 1.

Journal article
Published: 13 November 2019 in Journal of Alloys and Compounds
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In this work, was investigated the structural, optical and electrical properties of the titanium dioxide nanoparticles deposited as thin film using spray pyrolysis technique for a dye synthetized solar cell (DSSC) which provides a technically and economically credible alternative concept to present day p–n junction photovoltaic devices. It was involved in this study, the crystal size that was estimated by Scherrer method with the X-ray diffraction (XRD) patterns and the scanning electron microscopy images (SEM), and the thickness of TiO2 multilayer effects on its physical properties. TiO2 was synthetized using sol-gel dip coating method and grown on a commercial indium tin oxide (ITO) with a thin layer of carbon nanotubes for better electrical conductivity. The Lithium electrolyte was converted into gel for better efficiency and less degradation of the thin layer of the dye synthetized solar cell. Ultraviolet–visible spectroscopy (UV–Vis) was used to get the degradation degree, the light intensity and the optical transmittance and absorbance. For different number of layers of TiO2 thin films, it was investigated the thickness dependence of structural, morphological and optical properties of semiconductor. Ab-initio calculations were used with Linear Augmented Plan Waves method (LAPW) and Tran-Blaha Modified Becke-Johnson Density Functional (TB-mbj) to predict corroborate the electrical, structural and optical properties of the samples.

ACS Style

Zakaryaa Zarhri; Miguel Ángel Avilés Cardos; Younes Ziat; Maryama Hammi; Omar El Rhazouani; Julio Cesar Cruz Argüello; David Avellaneda Avellaneda. Synthesis, structural and crystal size effect on the optical properties of sprayed TiO2 thin films: Experiment and DFT TB-mbj. Journal of Alloys and Compounds 2019, 819, 153010 .

AMA Style

Zakaryaa Zarhri, Miguel Ángel Avilés Cardos, Younes Ziat, Maryama Hammi, Omar El Rhazouani, Julio Cesar Cruz Argüello, David Avellaneda Avellaneda. Synthesis, structural and crystal size effect on the optical properties of sprayed TiO2 thin films: Experiment and DFT TB-mbj. Journal of Alloys and Compounds. 2019; 819 ():153010.

Chicago/Turabian Style

Zakaryaa Zarhri; Miguel Ángel Avilés Cardos; Younes Ziat; Maryama Hammi; Omar El Rhazouani; Julio Cesar Cruz Argüello; David Avellaneda Avellaneda. 2019. "Synthesis, structural and crystal size effect on the optical properties of sprayed TiO2 thin films: Experiment and DFT TB-mbj." Journal of Alloys and Compounds 819, no. : 153010.

Journal article
Published: 30 September 2019 in Revista de Sistemas Experimentales
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The Gas Diffusion Layer (GDL) provides a transport route for the reactant species from the flow channels to the catalytic layer in a fuel cell. The components design requires that the species present a uniform diffusion towards the electrodes and that the formed products are shifted as faster as possible, to avoid the increase of the ohmic resistance due to the blocking of the active sites, or it constitutes a bottleneck that the performance decrease fast. This work presents a solution proposal for the continuity equation in incomprenssible fluids in a 3D model of a gas diffuser layer with titanium wired mesh characteristics of a fuel cell using "OpenFOAM" open source software. The aim of the study is to show that under different scales or size of the gas diffusion layer there are significant changes in the velocities of propagation of the reactant species towards the active area of the fuel cell.

ACS Style

Blandy Pamplona-Solis; Julio Cruz-Argüello; Leopoldo Gomez-Barba; Isaias May-Canche. Transporte masa: Simulación de fluidos incomprensibles en una capa difusora de gas utilizando OpenFoam. Revista de Sistemas Experimentales 2019, 16 -24.

AMA Style

Blandy Pamplona-Solis, Julio Cruz-Argüello, Leopoldo Gomez-Barba, Isaias May-Canche. Transporte masa: Simulación de fluidos incomprensibles en una capa difusora de gas utilizando OpenFoam. Revista de Sistemas Experimentales. 2019; ():16-24.

Chicago/Turabian Style

Blandy Pamplona-Solis; Julio Cruz-Argüello; Leopoldo Gomez-Barba; Isaias May-Canche. 2019. "Transporte masa: Simulación de fluidos incomprensibles en una capa difusora de gas utilizando OpenFoam." Revista de Sistemas Experimentales , no. : 16-24.

Conference paper
Published: 18 September 2019 in IOP Conference Series: Materials Science and Engineering
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National indicators point that 85% of Mexico's energy production come from fossil fuels. Quintana Roo is the state with the most significant increase on energy consumption with almost 20% from 2010 to 2017. This project carries out a holistic energy analysis approach in three case studies in typical dwellings built with average materials and construction systems under tropical climate conditions. Two validation levels were performed, one with an historical weather data file, and the second one with a costumed weather file corresponding to February 2019. The obtained values of mean bias error on an hourly-based analysis in interior conditions varied with the following ranges: level 1, from 1.57% to 2.11%; in level 2, from 1.17% to 1.74%. On the other hand, it was also found that the first level of simulation predicted the electricity consumption slightly closer to actual values reported for February 2019, with values ranging from 7.56% to 16.63%. However, further analysis with more detailed input data and monitoring of daily consumption is recommended in order to reduce the variation ranges.

ACS Style

R. Alexis Barrientos-Gonzalez; Ricardo E. Vega-Azamar; Julio Cruz; Gabriela Rosas-Correa; Norma A. Oropeza-García. Environmental Performance of a Social Housing Type Characteristic of South-Eastern Mexico. IOP Conference Series: Materials Science and Engineering 2019, 603, 052051 .

AMA Style

R. Alexis Barrientos-Gonzalez, Ricardo E. Vega-Azamar, Julio Cruz, Gabriela Rosas-Correa, Norma A. Oropeza-García. Environmental Performance of a Social Housing Type Characteristic of South-Eastern Mexico. IOP Conference Series: Materials Science and Engineering. 2019; 603 (5):052051.

Chicago/Turabian Style

R. Alexis Barrientos-Gonzalez; Ricardo E. Vega-Azamar; Julio Cruz; Gabriela Rosas-Correa; Norma A. Oropeza-García. 2019. "Environmental Performance of a Social Housing Type Characteristic of South-Eastern Mexico." IOP Conference Series: Materials Science and Engineering 603, no. 5: 052051.

Journal article
Published: 02 August 2019 in Climate
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Urban territorial expansion generated in the last decades has brought a series of consequences, such as the variation between urban and suburban weather conditions affecting indoor temperature and increasing electricity consumption derived from the use of cooling systems. Current approaches of simulation models in residential buildings use indoor environmental data for carrying out validations to propose hygrothermal comfort alternatives for the mitigation of the effects of the external environmental conditions on the interior spaces of dwellings. In this work, an hourly evaluation of both indoor and outdoor environmental parameters of two case studies in a tropical climate was carried out, by means of a whole-building simulation approach tool during a week representative of the warmest period of the year. The integration of the collected environmental data in the theoretical model allowed us to reduce the error range of the estimated indoor temperature with results in normalized mean bias error between 7.10% and −0.74% and in coefficient of variation of the root mean square error between 16.72% and 2.62%, in the different indoor zones of the case studies. At the same time, the energy assessment showed a difference of 33% in Case 1 and −217% in Case 2 for final electricity consumption.

ACS Style

R. Alexis Barrientos-González; Ricardo E. Vega-Azamar; Julio C. Cruz-Argüello; Norma A. Oropeza-García; Maritza Chan-Juárez; Danna Lizeth Trejo-Arroyo. Indoor Temperature Validation of Low-Income Detached Dwellings under Tropical Weather Conditions. Climate 2019, 7, 96 .

AMA Style

R. Alexis Barrientos-González, Ricardo E. Vega-Azamar, Julio C. Cruz-Argüello, Norma A. Oropeza-García, Maritza Chan-Juárez, Danna Lizeth Trejo-Arroyo. Indoor Temperature Validation of Low-Income Detached Dwellings under Tropical Weather Conditions. Climate. 2019; 7 (8):96.

Chicago/Turabian Style

R. Alexis Barrientos-González; Ricardo E. Vega-Azamar; Julio C. Cruz-Argüello; Norma A. Oropeza-García; Maritza Chan-Juárez; Danna Lizeth Trejo-Arroyo. 2019. "Indoor Temperature Validation of Low-Income Detached Dwellings under Tropical Weather Conditions." Climate 7, no. 8: 96.

Journal article
Published: 30 June 2019 in Revista de Simulación y Laboratorio
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The hydrogen is an attractive energy carrier and electrolysis of water is the most efficient to H2 production process. The OER in the anode is the limiting reaction being the case of study. In the present work materials based on IrO2 and WO3 were developed in different mechanical mixing 100, 70:30, 50:50, 30:70, respectively, by means of a mechanical mixture from two chemical reduction syntheses. The IrO2 was obtained by 6.25 mM of IrCl3 dissolved in isopropyl alcohol by adjusting the pH with 1M NaOH and a 0.5 mol NH4OH reductant was applied by adjusting a basic pH of 13. The obtained precursor was filtered and calcined at 400 ° C for 1hr. WO3 was obtained from 10mM WCl6 dissolved in isopropyl alcohol and polyethylene glycol, generating a precursor of W (OH)x followed by a calcination process at 500 ° C for 1hr. The material was characterized by electrochemical techniques of CV, LV and EIS. The IrO2-WO3 (50:50) material has lower activation energy of overpotential at room temperature, and a maximum current density close to 20 mA /cm2 at 1.8V vs Hg/Hg2SO4.

ACS Style

Jesús Ramsés Cardona-Canto; Julio César Cruz-Argüello; Danna Lizeth Trejo-Arroyo; Daniel Canté-Góngora. Aplicación de nanopartículas de IrO2-WO3 como material anódico para la Reacción de Evolución de Oxígeno en un medio ácido. Revista de Simulación y Laboratorio 2019, 9 -15.

AMA Style

Jesús Ramsés Cardona-Canto, Julio César Cruz-Argüello, Danna Lizeth Trejo-Arroyo, Daniel Canté-Góngora. Aplicación de nanopartículas de IrO2-WO3 como material anódico para la Reacción de Evolución de Oxígeno en un medio ácido. Revista de Simulación y Laboratorio. 2019; ():9-15.

Chicago/Turabian Style

Jesús Ramsés Cardona-Canto; Julio César Cruz-Argüello; Danna Lizeth Trejo-Arroyo; Daniel Canté-Góngora. 2019. "Aplicación de nanopartículas de IrO2-WO3 como material anódico para la Reacción de Evolución de Oxígeno en un medio ácido." Revista de Simulación y Laboratorio , no. : 9-15.

Journal article
Published: 12 February 2019 in Applied Sciences
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In this research, the effect of the addition of zirconium oxide-synthesized nanoparticles on the microstructural development and the physical–mechanical properties of cement mortars with limestone aggregates was studied. Zirconia nanoparticles were synthesized using the co-precipitation method. According to XRD analysis, a mixture of tetragonal (t) and monoclinic (m) zirconia phases was obtained, with average crystallite sizes around 15.18 and 17.79 nm, respectively. Based on the ASTM standards, a mixture design was obtained for a coating mortar with a final sand/cement ratio of 1:2.78 and a water/cement ratio of 0.58. Control mortars and mortars with ZrO2 additions were analyzed for two stages of curing of the mortar—7 and 28 days. According to SEM analysis, mortars with ZrO2 revealed a microstructure with a high compaction degree and an increase in compressive strength of 9% on the control mortars. Due to the aggregates’ characteristics, adherence with the cement paste in the interface zone was increased. It is suggested that the reinforcing effect of ZrO2 on the mortars was caused by the effect of nucleation sites in the main phase C–S–H and the inhibition of the growth of large CH crystals, and the filler effect generated by the nanometric size of the particles. This produced a greater compaction volume, suggesting that faults are probably originated in the aggregates.

ACS Style

Danna L. Trejo-Arroyo; Karen E. Acosta; Julio C. Cruz; Ana Maria Valenzuela-Muñiz; Ricardo E. Vega-Azamar; Luis F. Jiménez; Danna Trejo-Arroyo. Influence of ZrO2 Nanoparticles on the Microstructural Development of Cement Mortars with Limestone Aggregates. Applied Sciences 2019, 9, 598 .

AMA Style

Danna L. Trejo-Arroyo, Karen E. Acosta, Julio C. Cruz, Ana Maria Valenzuela-Muñiz, Ricardo E. Vega-Azamar, Luis F. Jiménez, Danna Trejo-Arroyo. Influence of ZrO2 Nanoparticles on the Microstructural Development of Cement Mortars with Limestone Aggregates. Applied Sciences. 2019; 9 (3):598.

Chicago/Turabian Style

Danna L. Trejo-Arroyo; Karen E. Acosta; Julio C. Cruz; Ana Maria Valenzuela-Muñiz; Ricardo E. Vega-Azamar; Luis F. Jiménez; Danna Trejo-Arroyo. 2019. "Influence of ZrO2 Nanoparticles on the Microstructural Development of Cement Mortars with Limestone Aggregates." Applied Sciences 9, no. 3: 598.

Journal article
Published: 01 December 2015 in International Journal of Hydrogen Energy
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Nowadays, society and the economy largely depend on wireless communications because they allow freedom of human activities from spatial and temporal restrictions. To add mobility to this communication technology type, portable communication networks can be implemented to achieve this aim as well as to provide ubiquitous coverage in emergency circumstances. In accordance with the above-mentioned points, we study a photovoltaic–hydrogen system (PVS–H2) for a portable emergency communication system (PECS), which operates in a mobile ad-hoc mesh network. As a case study, a theoretical application on the effects of two hurricanes per year in Cancun, Mexico using real weather data and random dates is presented. A power system was sized to cope with hypothetical emergency communication scenarios. The results show that the PVS–H2 can operate during two hurricanes with an efficacy of 79.14% and a standard deviation of 0.96%. According to the results, the analysis strategy can determine the best configuration to avoid oversizing or undersizing with a small standard deviation. The obtained sizing result ensures that the PVS–H2 supplies adequate energy for the PECS.

ACS Style

Romeli Barbosa; Victor M. Sanchez; Beatriz Escobar; Julio C. Cruz; Homero Toral-Cruz. Sizing of a solar-hydrogen power source for a portable emergency communication system: Case study of hurricanes in Cancun, Mexico. International Journal of Hydrogen Energy 2015, 40, 17361 -17370.

AMA Style

Romeli Barbosa, Victor M. Sanchez, Beatriz Escobar, Julio C. Cruz, Homero Toral-Cruz. Sizing of a solar-hydrogen power source for a portable emergency communication system: Case study of hurricanes in Cancun, Mexico. International Journal of Hydrogen Energy. 2015; 40 (48):17361-17370.

Chicago/Turabian Style

Romeli Barbosa; Victor M. Sanchez; Beatriz Escobar; Julio C. Cruz; Homero Toral-Cruz. 2015. "Sizing of a solar-hydrogen power source for a portable emergency communication system: Case study of hurricanes in Cancun, Mexico." International Journal of Hydrogen Energy 40, no. 48: 17361-17370.

Research article
Published: 19 April 2015 in Mathematical Problems in Engineering
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Over the last decade there has been a growing interest in the research of feasibility to use high altitude long endurance (HALE) aircrafts in order to provide mobile communications. The use of HALEs for telecommunication networks has the potential to deliver a wide range of communication services (from high-quality voice to high-definition videos, as well as high-data-rate wireless channels) cost effectively. One of the main challenges of this technology is to design its power supply system, which must provide the enough energy for long time flights in a reliable way. In this paper a photovoltaic/hydrogen system is proposed as power system for a HALE aircraft due its high power density characteristic. In order to obtain the optimal sizing for photovoltaic/hydrogen system a particle swarm optimizer (PSO) is used. As a case study, theoretical design of the photovoltaic/hydrogen power system for three different HALE aircrafts located at 18° latitude is presented. At this latitude, the range of solar radiation intensity was from 310 to 450 Wh/sq·m/day. The results obtained show that the photovoltaic/hydrogen systems calculated by PSO can operate during one year with efficacies ranging between 45.82% and 47.81%. The obtained sizing result ensures that the photovoltaic/hydrogen system supplies adequate energy for HALE aircrafts.

ACS Style

Víctor M. Sánchez; Romeli Barbosa; Julio Cruz; F. Chan; J. Hernandez. Optimal Sizing of a Photovoltaic-Hydrogen Power System for HALE Aircraft by means of Particle Swarm Optimization. Mathematical Problems in Engineering 2015, 2015, 1 -8.

AMA Style

Víctor M. Sánchez, Romeli Barbosa, Julio Cruz, F. Chan, J. Hernandez. Optimal Sizing of a Photovoltaic-Hydrogen Power System for HALE Aircraft by means of Particle Swarm Optimization. Mathematical Problems in Engineering. 2015; 2015 ():1-8.

Chicago/Turabian Style

Víctor M. Sánchez; Romeli Barbosa; Julio Cruz; F. Chan; J. Hernandez. 2015. "Optimal Sizing of a Photovoltaic-Hydrogen Power System for HALE Aircraft by means of Particle Swarm Optimization." Mathematical Problems in Engineering 2015, no. : 1-8.

Journal article
Published: 19 September 2013 in International Journal of Hydrogen Energy
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The Mexican territory has a large potential for renewable energy development, such as geothermal, hydro, biofuels, wind and solar. Thus, a 2.5 kW hybrid power system (solar, wind and hydrogen) was designed and installed to meet the power demand for a stand-alone application at the University of Zacatecas. The hybrid unit integrates three power energy sources –a photovoltaic system (PV), a micro-wind turbine (WT), a prototype of a unitized regenerative fuel cell (URFC) and energy storage devices (batteries)– in addition to their interaction methodology. The main contribution of this work is the URFC integration to a hybrid power system for the production of H2 (water electrolyzer mode) and energy (fuel cell mode). These three energy technologies were connected in parallel, synchronized to the energy storage system and finally coupled to a power conversion module. To achieve the best performance and energy management, an energy management and control strategy was developed to the properly operation of the power plant. A meteorological station that has wireless sensors for the temperature, the humidity, the solar radiation and the wind speed provides the necessary information (in real time) to the monitor and control software, which computes and executes the short and mid–term decisions about the energy management and the data storage for future analysis.

ACS Style

A.U. Chávez-Ramírez; Julio Cruz; R. Espinosa-Lumbreras; J. Ledesma-García; Sergio M Duron-Torres; L.G. Arriaga. Design and set up of a hybrid power system (PV-WT-URFC) for a stand-alone application in Mexico. International Journal of Hydrogen Energy 2013, 38, 12623 -12633.

AMA Style

A.U. Chávez-Ramírez, Julio Cruz, R. Espinosa-Lumbreras, J. Ledesma-García, Sergio M Duron-Torres, L.G. Arriaga. Design and set up of a hybrid power system (PV-WT-URFC) for a stand-alone application in Mexico. International Journal of Hydrogen Energy. 2013; 38 (28):12623-12633.

Chicago/Turabian Style

A.U. Chávez-Ramírez; Julio Cruz; R. Espinosa-Lumbreras; J. Ledesma-García; Sergio M Duron-Torres; L.G. Arriaga. 2013. "Design and set up of a hybrid power system (PV-WT-URFC) for a stand-alone application in Mexico." International Journal of Hydrogen Energy 38, no. 28: 12623-12633.

Journal article
Published: 28 June 2013 in Environmental Science & Technology
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An electro-Fenton-based method was used to promote the regeneration of granular activated carbon (GAC) previously adsorbed with toluene. Electrochemical regeneration experiments were carried out using a standard laboratory electrochemical cell with carbon paste electrodes and a batch electrochemical reactor. For each system, a comparison was made using FeSO4 as a precursor salt in solution (homogeneous system) and an Fe-loaded ion-exchange resin (Purolite C-100, heterogeneous system), both in combination with electrogenerated H2O2 at the GAC cathode. In the two cases, high regeneration efficiencies were obtained in the presence of iron using appropriate conditions of applied potential and adsorption-polarization time. Consecutive loading and regeneration cycles of GAC were performed in the reactor without great loss of the adsorption properties, only reducing the regeneration efficiency by 1% per cycle during 10 cycles of treatment. Considering that, in the proposed resin-containing process, the use of Fe salts is avoided and that GAC cathodic polarization results in efficient cleaning and regeneration of the adsorbent material, this novel electro-Fenton approach could constitute an excellent alternative for regenerating activated carbon when compared to conventional methods.

ACS Style

Jennifer A. Bañuelos; Francisco J. Rodríguez; Juan Manríquez Rocha; Erika Bustos; Adrián Rodríguez; Julio Cruz; L. G. Arriaga; Luis A. Godínez. Novel Electro-Fenton Approach for Regeneration of Activated Carbon. Environmental Science & Technology 2013, 47, 7927 -7933.

AMA Style

Jennifer A. Bañuelos, Francisco J. Rodríguez, Juan Manríquez Rocha, Erika Bustos, Adrián Rodríguez, Julio Cruz, L. G. Arriaga, Luis A. Godínez. Novel Electro-Fenton Approach for Regeneration of Activated Carbon. Environmental Science & Technology. 2013; 47 (14):7927-7933.

Chicago/Turabian Style

Jennifer A. Bañuelos; Francisco J. Rodríguez; Juan Manríquez Rocha; Erika Bustos; Adrián Rodríguez; Julio Cruz; L. G. Arriaga; Luis A. Godínez. 2013. "Novel Electro-Fenton Approach for Regeneration of Activated Carbon." Environmental Science & Technology 47, no. 14: 7927-7933.

Journal article
Published: 01 February 2013 in International Journal of Hydrogen Energy
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ACS Style

A.U. Chávez-Ramírez; V. Vallejo-Becerra; Julio Cruz; R. Ornelas; G. Orozco; R. Muñoz-Guerrero; L.G. Arriaga. A hybrid power plant (Solar–Wind–Hydrogen) model based in artificial intelligence for a remote-housing application in Mexico. International Journal of Hydrogen Energy 2013, 38, 2641 -2655.

AMA Style

A.U. Chávez-Ramírez, V. Vallejo-Becerra, Julio Cruz, R. Ornelas, G. Orozco, R. Muñoz-Guerrero, L.G. Arriaga. A hybrid power plant (Solar–Wind–Hydrogen) model based in artificial intelligence for a remote-housing application in Mexico. International Journal of Hydrogen Energy. 2013; 38 (6):2641-2655.

Chicago/Turabian Style

A.U. Chávez-Ramírez; V. Vallejo-Becerra; Julio Cruz; R. Ornelas; G. Orozco; R. Muñoz-Guerrero; L.G. Arriaga. 2013. "A hybrid power plant (Solar–Wind–Hydrogen) model based in artificial intelligence for a remote-housing application in Mexico." International Journal of Hydrogen Energy 38, no. 6: 2641-2655.

Journal article
Published: 01 September 2012 in International Journal of Hydrogen Energy
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ACS Style

J.C. Cruz; S. Rivas; D. Beltran; Y. Meas; R. Ornelas; G. Osorio-Monreal; L. Ortiz-Frade; J. Ledesma-García; L.G. Arriaga. Synthesis and evaluation of ATO as a support for Pt–IrO2 in a unitized regenerative fuel cell. International Journal of Hydrogen Energy 2012, 37, 13522 -13528.

AMA Style

J.C. Cruz, S. Rivas, D. Beltran, Y. Meas, R. Ornelas, G. Osorio-Monreal, L. Ortiz-Frade, J. Ledesma-García, L.G. Arriaga. Synthesis and evaluation of ATO as a support for Pt–IrO2 in a unitized regenerative fuel cell. International Journal of Hydrogen Energy. 2012; 37 (18):13522-13528.

Chicago/Turabian Style

J.C. Cruz; S. Rivas; D. Beltran; Y. Meas; R. Ornelas; G. Osorio-Monreal; L. Ortiz-Frade; J. Ledesma-García; L.G. Arriaga. 2012. "Synthesis and evaluation of ATO as a support for Pt–IrO2 in a unitized regenerative fuel cell." International Journal of Hydrogen Energy 37, no. 18: 13522-13528.

Journal article
Published: 30 April 2012 in International Journal of Hydrogen Energy
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A new generation of highly efficient and non-polluting energy conversion and storage systems is vital to meeting the challenges of global warming and the finite reality of fossil fuels. In this work, nanosized Pt/IrO2 electrocatalysts are synthesized and investigated for the oxygen evolution and reduction reactions in unitized regenerative fuel cells (URFCs). The catalysts are prepared by decorating Pt nanoparticles (2–10 nm) onto the surface of a nanophase IrO2 (7 nm) support using an ultrasonic polyol method. The synthesis procedure allows deposition of metallic Pt nanoparticles on Ir-oxide without causing any occurrence of metallic Ir. The latter is significantly less active for oxygen evolution than the corresponding oxide. This process represents an important progress with respect to the state of the art in this field being the oxygen electrocatalyst generally obtained by mechanical mixing of Pt and IrO2. The nanosized Pt/IrO2 (50:50 wt.%) is sprayed onto a Nafion 115 membrane and used as dual function oxygen electrode, whereas 30 wt.% Pt/C is used as dual function hydrogen electrode in the URFC. Electrochemical activity of the membrane-electrode assembly (MEA) is investigated in a single cell at room temperature and atmospheric pressure both under electrolysis and fuel cell mode to assess the perspectives of the URFC to operate as energy storage device in conjunction with renewable power sources.

ACS Style

J.C. Cruz; V. Baglio; Salvatore Siracusano; R. Ornelas; L.G. Arriaga; V. Antonucci; A.S. Aricò. Nanosized Pt/IrO2 electrocatalyst prepared by modified polyol method for application as dual function oxygen electrode in unitized regenerative fuel cells. International Journal of Hydrogen Energy 2012, 37, 5508 -5517.

AMA Style

J.C. Cruz, V. Baglio, Salvatore Siracusano, R. Ornelas, L.G. Arriaga, V. Antonucci, A.S. Aricò. Nanosized Pt/IrO2 electrocatalyst prepared by modified polyol method for application as dual function oxygen electrode in unitized regenerative fuel cells. International Journal of Hydrogen Energy. 2012; 37 (7):5508-5517.

Chicago/Turabian Style

J.C. Cruz; V. Baglio; Salvatore Siracusano; R. Ornelas; L.G. Arriaga; V. Antonucci; A.S. Aricò. 2012. "Nanosized Pt/IrO2 electrocatalyst prepared by modified polyol method for application as dual function oxygen electrode in unitized regenerative fuel cells." International Journal of Hydrogen Energy 37, no. 7: 5508-5517.

Journal article
Published: 10 April 2010 in Journal of Nanoparticle Research
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Nanosized IrO2 electrocatalysts (d ~ 7–9 nm) with specific surface area up to 100 m2 g−1 were synthesized and characterized for the oxygen evolution reaction in a solid polymer electrolyte (SPE) electrolyzer. The catalysts were prepared by a colloidal method in aqueous solution and a subsequent thermal treatment. An iridium hydroxide hydrate precursor was obtained at ~100 °C, which was, successively, calcined at different temperatures from 200 to 500 °C. The physico-chemical characterization was carried out by X-ray diffraction (XRD), thermogravimetry–differential scanning calorimetry (TG–DSC) and transmission electron microscopy (TEM). IrO2 catalysts were sprayed onto a Nafion 115 membrane up to a loading of 3 mg cm−2. A Pt catalyst was used at the cathode compartment with a loading of 0.6 mg cm−2. The electrochemical activity for water electrolysis of the membrane-electrode assemblies (MEAs) was investigated in a single cell SPE electrolyzer by steady-state polarization curves, impedance spectroscopy and chrono-amperometric measurements. A maximum current density of 1.3 A cm−2 was obtained at 1.8 V and 80 °C for the IrO2 catalyst calcined at 400 °C for 1 h. A stable performance was recorded in single cell for this anode catalyst at 80 °C. The suitable catalytic activity and stability of the most performing catalyst were interpreted in terms of proper combination between nanostructure and suitable morphology.

ACS Style

J. C. Cruz; V. Baglio; Salvatore Siracusano; R. Ornelas; L. Ortiz-Frade; L. G. Arriaga; V. Antonucci; Antonino Salvatore Arico'. Nanosized IrO2 electrocatalysts for oxygen evolution reaction in an SPE electrolyzer. Journal of Nanoparticle Research 2010, 13, 1639 -1646.

AMA Style

J. C. Cruz, V. Baglio, Salvatore Siracusano, R. Ornelas, L. Ortiz-Frade, L. G. Arriaga, V. Antonucci, Antonino Salvatore Arico'. Nanosized IrO2 electrocatalysts for oxygen evolution reaction in an SPE electrolyzer. Journal of Nanoparticle Research. 2010; 13 (4):1639-1646.

Chicago/Turabian Style

J. C. Cruz; V. Baglio; Salvatore Siracusano; R. Ornelas; L. Ortiz-Frade; L. G. Arriaga; V. Antonucci; Antonino Salvatore Arico'. 2010. "Nanosized IrO2 electrocatalysts for oxygen evolution reaction in an SPE electrolyzer." Journal of Nanoparticle Research 13, no. 4: 1639-1646.