Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2011-10-05

Journal: CATALYSIS COMMUNICATIONS

Included Journals: EI、SCIE、Scopus

Volume: 13

Issue: 1

Page Number: 18-21

ISSN: 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.