Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 46, Issue 43, Pages 22508-22518Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2021.04.099
Keywords
Sn modification; Oxygen vacancies
Categories
Funding
- National Natural Science Foundation of China [42030712, 21966018, 22006059, 21968015]
- Applied Basic Research Program of Yunnan Province, China [2019FD034]
- Science Research Fund Project of Yunnan Provincial Department of Education [2020J0060]
- Analysis and Testing Fund of Kunming University of Science and Technology [2018T20170052]
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Investigation of Sn modified CuO-CeO2 catalysts showed that Sn-Cu-Ce-5 catalyst exhibited stronger interaction between active sites and support, higher amounts of Sn2+ and Ce3+, and increased amount of oxygen vacancies, leading to excellent catalytic performance even in the presence of CO2 and H2O.
Sn modified CuO-CeO2 catalysts with different Sn loadings were prepared by a facile, green and solvent-free method. The effect of Sn/Ce ratio over Sn-Cu-Ce-x (x = 0, 1, 2.5, 5, 7.5) samples on CO activity and O2 selectivity was investigated. The samples were characterized by various techniques using N2-adsorption/desorption, XRD, H2-TPR, XPS, Raman and in-situ DRIFTS. It was revealed that stronger interaction between acitve sites and support, higher amounts of Sn2+ and Ce3+, associated with increased amount of oxygen vacancies, were observed on the catalyst of Sn-Cu-Ce-5. As a result, the optimized catalyst displayed an excellent catalytic performance even in the presence of CO2 and H2O. In this sense, probing the Sn modified CuO-CeO2 catalyst can elucidate some useful keys for the
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