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Indexed by:期刊论文

Date of Publication:2011-10-05

Journal:CATALYSIS COMMUNICATIONS

Included Journals:Scopus、SCIE、EI

Volume:13

Issue:1

Page Number:18-21

ISSN No.:1566-7367

Key Words:Au/CeO2; Deposition-precipitation; Pretreatment atmosphere; H-2-TPR

Abstract:Au/CeO2 catalyst was prepared via a deposition-precipitation method and further pretreated in different atmospheres prior to CO oxidation. A reductive atmosphere pretreatment slightly improved the low-temperature activity of Au/CeO2. The greatest activity was achieved when Au/CeO2 catalyst was subjected to an oxidative atmosphere followed by a reductive atmosphere pretreatment. Analysis using XRD, TEM and nitrogen sorption measurement showed that pretreatment retains the crystal phase, morphology and pore structure of CeO2. However, there was a change in the interaction between gold species and CeO2 support, as revealed by H-2-TPR measurement. (C) 2011 Elsevier B.V. All rights reserved.