Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 38, Issue 9, Pages 3597-3605Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2013.01.030
Keywords
CeO2/CuO; CuO/CeO2; Hydrogen; Preferential CO oxidation
Categories
Funding
- National Natural Science Foundation of China [21066004, 21061008]
- Natural Science Foundation of Inner Mongolia [2010BS0202]
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The CeO2/CuO and CuO/CeO2 catalysts were synthesized by the hydrothermal method and characterized via XRD, SEM, H-2-TPR, HRTEM, XPS and N-2 adsorption-desorption techniques. The study shows that the rod-like structure is self-assembled CeO2, and both hydrothermal time and Ce/Cu molar ratio are important factors when the particle-like CeO2 is being self-assembled into the rod-like CeO2. The CuO is key active component in the CO-PROX reaction, and its reduction has a negative influence on the selective oxidation of CO. The advantage of the inverse CeO2/CuO catalyst is that it still can provide sufficient CuO for CO oxidation before 200 degrees C in the hydrogen-rich reductive gasses. The traditional CuO/CeO2 catalyst shows better activity at lower temperature and the inverse CeO2/CuO catalysts present higher CO2 selectivity when the CO conversion reaches 100%. The performance of mixed sample verifies that they might be complementary in the CO-PROX system. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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