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13. Robust Au/Ce0.4Zr0.6O2 Catalyst for Dynamic Shutdown/Startup of the Water-Gas Shift Reaction in Realistic Reformate with <1 % O2.

Author

Liu, Xiaoyu, Xu, Ke, Fan, Yiqiu, Pei, Yan, Fan, Kangnian, Xie, Zaiku, and Qiao, Minghua

Subjects
WATER gas shift reactions, WATER chemistry, HETEROGENEOUS catalysis, GOLD catalysts, FUEL cells, ZIRCONIUM catalysts
Abstract

Development of a water-gas shift (WGS) catalyst durable in dynamic shutdown/startup operation is essential to enable residential applications of H2-powered fuel-cell systems but remains a conundrum for heterogeneous catalysis. We demonstrate herein that by isomorphic substitution of Zr in the lattice of CeO2 to increase the acid density of the catalyst, complemented by dosing a small amount of O2 to realistic reformate to improve the oxidizing potential, the formation of the notorious site-blocking carbonate species on the Au catalyst can be efficiently retarded. This allows the formation of a highly robust Au/Ce0.4Zr0.6O2 WGS catalyst suitable for the challenging shutdown/startup operation in realistic reformate. [ABSTRACT FROM AUTHOR]

Published
2014
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14. Robust Au/Ce0.4Zr0.6O2 Catalyst for Dynamic Shutdown/Startup of the Water-Gas Shift Reaction in Realistic Reformate with <1 % O2.

Author

Liu, Xiaoyu, Xu, Ke, Fan, Yiqiu, Pei, Yan, Fan, Kangnian, Xie, Zaiku, and Qiao, Minghua

Subjects
*WATER gas shift reactions, *WATER chemistry, *HETEROGENEOUS catalysis, *GOLD catalysts, *FUEL cells, *ZIRCONIUM catalysts
Abstract

Development of a water-gas shift (WGS) catalyst durable in dynamic shutdown/startup operation is essential to enable residential applications of H2-powered fuel-cell systems but remains a conundrum for heterogeneous catalysis. We demonstrate herein that by isomorphic substitution of Zr in the lattice of CeO2 to increase the acid density of the catalyst, complemented by dosing a small amount of O2 to realistic reformate to improve the oxidizing potential, the formation of the notorious site-blocking carbonate species on the Au catalyst can be efficiently retarded. This allows the formation of a highly robust Au/Ce0.4Zr0.6O2 WGS catalyst suitable for the challenging shutdown/startup operation in realistic reformate. [ABSTRACT FROM AUTHOR]

Published
2014
Full Text
View/download PDF

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