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Robust Au/Ce 0.4 Zr 0.6 O 2 Catalyst for Dynamic Shutdown/Startup of the Water–Gas Shift Reaction in Realistic Reformate with <1 % O 2
Author(s) -
Liu Xiaoyu,
Xu Ke,
Fan Yiqiu,
Pei Yan,
Fan Kangnian,
Xie Zaiku,
Qiao Minghua
Publication year - 2014
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201402592
Subject(s) - catalysis , shutdown , water gas shift reaction , catalytic reforming , oxidizing agent , chemical engineering , materials science , chemistry , nuclear chemistry , organic chemistry , engineering
Development of a water–gas shift (WGS) catalyst durable in dynamic shutdown/startup operation is essential to enable residential applications of H 2 ‐powered fuel‐cell systems but remains a conundrum for heterogeneous catalysis. We demonstrate herein that by isomorphic substitution of Zr in the lattice of CeO 2 to increase the acid density of the catalyst, complemented by dosing a small amount of O 2 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/Ce 0.4 Zr 0.6 O 2 WGS catalyst suitable for the challenging shutdown/startup operation in realistic reformate.