Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 42, Issue 8, Pages 5537-5548Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2016.08.078
Keywords
Mesoporous ceria; High surface area; Copper catalyst; Deposition-precipitation; CO-PROX reaction
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Funding
- Grant for International Research Integration: Chula Research Scholar, Ratchadaphiseksompote Endowment Fund, Chulalongkorn University, Thailand, Development and Promotion of Science and Technology Talents Project
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Copper (Cu) supported on mesoporous (MSP) ceria catalysts were prepared by deposition precipitation (DP) method for the preferential CO oxidation of CO in a H-2-rich stream (CO-PROX). A MSP ceria support with a high surface area of 293 m(2)/g and ordered structure was synthesized by a nanocasting process using MCM-48 as template. All copper-MSP ceria catalysts show high dispersion of Cu and still maintain the fluorite structure of MSP ceria. Moreover, TEM imaging confirmed the three dimensional and long-range ordered pore structure of the Cu-catalysts. The reduction temperature of the Cu-catalysts decreases compared to pure MSP ceria and the reduction of Ge4+ to Ce3+ decreases with increasing copper content. An MSP ceria catalyst with 7 wt% Cu loading (7Cu/MSP ceria) shows the highest activity with high stability for over 48 h in various feed components, making it attractive for use as a catalyst in purification of hydrogen. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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