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We explored the photoreforming of rice and corn starch with simultaneous hydrogen production over a Cd0.7Zn0.3S-based photocatalyst under visible light irradiation. The photocatalyst was characterized by UV–vis diffuse reflectance spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The influence of starch pretreatment conditions, such as hydrolysis temperature and alkaline concentration, on the reaction rate was studied. The maximum rate of H2 evolution was 730 μmol·h−1·g−1, with AQE = 1.8% at 450 nm, in the solution obtained after starch hydrolysis in 5 M NaOH at 70 °C. The composition of the aqueous phase of the suspension before and after the photocatalytic reaction was studied via high-performance liquid chromatography, and such products as glucose and sodium gluconate, acetate, formate, glycolate, and lactate were found after the photocatalytic reaction.
Anna Kurenkova; Tatiana Medvedeva; Nikolay Gromov; Andrey Bukhtiyarov; Evgeny Gerasimov; Svetlana Cherepanova; Ekaterina Kozlova. Sustainable Hydrogen Production from Starch Aqueous Suspensions over a Cd0.7Zn0.3S-Based Photocatalyst. Catalysts 2021, 11, 870 .
AMA StyleAnna Kurenkova, Tatiana Medvedeva, Nikolay Gromov, Andrey Bukhtiyarov, Evgeny Gerasimov, Svetlana Cherepanova, Ekaterina Kozlova. Sustainable Hydrogen Production from Starch Aqueous Suspensions over a Cd0.7Zn0.3S-Based Photocatalyst. Catalysts. 2021; 11 (7):870.
Chicago/Turabian StyleAnna Kurenkova; Tatiana Medvedeva; Nikolay Gromov; Andrey Bukhtiyarov; Evgeny Gerasimov; Svetlana Cherepanova; Ekaterina Kozlova. 2021. "Sustainable Hydrogen Production from Starch Aqueous Suspensions over a Cd0.7Zn0.3S-Based Photocatalyst." Catalysts 11, no. 7: 870.
The paper presents the results of studies of catalytic properties of cesium salts of heteropoly acids Cs4–хHхSiW12O40 (x = 3 and 3.5), Cs3–хHхPMo12O40 and Cs3–хHхPW12O40 (x = 2 and 2.5) for hydrolysis of cellulose to glucose at 180°C under argon atmosphere. Glucose is shown to be the main reaction product. The maximum hourly yield equal to 23% is observed in the presence of Cs3HSiW12O40. It is assumed that the catalyst efficiency is affected by the specific surface area. It is established that both heterogeneous and homogeneous processes occur in the presence of the salts due to leaching of the active component to the solution. The prepared salts are demonstrated to be more efficient than systems reported previously in literature.
N. V. Gromov; T. B. Medvedeva; O. P. Taran; M. N. Timofeeva; V. N. Parmon. Hydrolysis of Cellulose in the Presence of Catalysts Based on Cesium Salts of Heteropoly Acids. Catalysis in Industry 2021, 13, 73 -80.
AMA StyleN. V. Gromov, T. B. Medvedeva, O. P. Taran, M. N. Timofeeva, V. N. Parmon. Hydrolysis of Cellulose in the Presence of Catalysts Based on Cesium Salts of Heteropoly Acids. Catalysis in Industry. 2021; 13 (1):73-80.
Chicago/Turabian StyleN. V. Gromov; T. B. Medvedeva; O. P. Taran; M. N. Timofeeva; V. N. Parmon. 2021. "Hydrolysis of Cellulose in the Presence of Catalysts Based on Cesium Salts of Heteropoly Acids." Catalysis in Industry 13, no. 1: 73-80.
The hydrolysis–hydrogenation of arabinogalactan hemicellulose to valuable polyalcohols arabitol and galactitol, which are widely used in the food and pharmaceutical industries, is studied. The possibility of using a bifunctional catalyst containing disperse ruthenium supported on cesium salt of heteropolyacid Ru/Cs3HSiW12O40 for the process is demonstrated. A series of catalysts with different contents of the noble metal (0.3, 0.6 and 1 wt %) were prepared. Physicochemical techniques (low temperature nitrogen adsorption, IR spectroscopy, XRD, TEM) are used to characterize the prepared catalysts and the Cs3HSiW12O40 support. The effect the temperature and the substrate : catalyst ratio, and the content of ruthenium in the catalyst, have on the yields of the target products is studied. The highest yields of arabitol and galactitol were observed for a catalyst containing 0.6 wt % of Ru at a substrate : catalyst ratio of 1 : 1. Arabitol and galactitol can be produced with yields of 12 and 48%, respectively, at 200°C in the presence of 0.6%Ru/Cs3HSiW12O40 catalyst.
N. V. Gromov; T. B. Medvedeva; V. N. Panchenko; M. N. Timofeeva; V. N. Parmon. Hydrolysis–Hydrogenation of Arabinogalactan Catalyzed by Ru/Cs3HSiW12O40. Catalysis in Industry 2021, 13, 81 -89.
AMA StyleN. V. Gromov, T. B. Medvedeva, V. N. Panchenko, M. N. Timofeeva, V. N. Parmon. Hydrolysis–Hydrogenation of Arabinogalactan Catalyzed by Ru/Cs3HSiW12O40. Catalysis in Industry. 2021; 13 (1):81-89.
Chicago/Turabian StyleN. V. Gromov; T. B. Medvedeva; V. N. Panchenko; M. N. Timofeeva; V. N. Parmon. 2021. "Hydrolysis–Hydrogenation of Arabinogalactan Catalyzed by Ru/Cs3HSiW12O40." Catalysis in Industry 13, no. 1: 81-89.
Tatyana B. Medvedeva. Xylan catalytic processing to produce formic acid and xylitol in the presence of heteropoly acids. Vestnik Тomskogo gosudarstvennogo universiteta. Khimiya 2018, 6 -22.
AMA StyleTatyana B. Medvedeva. Xylan catalytic processing to produce formic acid and xylitol in the presence of heteropoly acids. Vestnik Тomskogo gosudarstvennogo universiteta. Khimiya. 2018; (11):6-22.
Chicago/Turabian StyleTatyana B. Medvedeva. 2018. "Xylan catalytic processing to produce formic acid and xylitol in the presence of heteropoly acids." Vestnik Тomskogo gosudarstvennogo universiteta. Khimiya , no. 11: 6-22.
Arina N. Suboch; Nikolai V. Gromov; Tatyana B. Medvedeva; Lidia S. Kibis; Evgeniy Yu. Gerasimov; Artemiy B. Ayusheev; Olga Yu. Podyacheva; Oxana P. Taran. Catalytic wet air oxidation of phenol in the presence of catalysts based on highly dispersed Ru supported on carbon nanotubes. Vestnik Тomskogo gosudarstvennogo universiteta. Khimiya 2018, 65 -82.
AMA StyleArina N. Suboch, Nikolai V. Gromov, Tatyana B. Medvedeva, Lidia S. Kibis, Evgeniy Yu. Gerasimov, Artemiy B. Ayusheev, Olga Yu. Podyacheva, Oxana P. Taran. Catalytic wet air oxidation of phenol in the presence of catalysts based on highly dispersed Ru supported on carbon nanotubes. Vestnik Тomskogo gosudarstvennogo universiteta. Khimiya. 2018; (11):65-82.
Chicago/Turabian StyleArina N. Suboch; Nikolai V. Gromov; Tatyana B. Medvedeva; Lidia S. Kibis; Evgeniy Yu. Gerasimov; Artemiy B. Ayusheev; Olga Yu. Podyacheva; Oxana P. Taran. 2018. "Catalytic wet air oxidation of phenol in the presence of catalysts based on highly dispersed Ru supported on carbon nanotubes." Vestnik Тomskogo gosudarstvennogo universiteta. Khimiya , no. 11: 65-82.