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论文类型：期刊论文

发表时间：2011-10-05

发表刊物：CATALYSIS COMMUNICATIONS

收录刊物：Scopus、SCIE、EI

卷号：13

期号：1

页面范围：18-21

ISSN号：1566-7367

关键字：Au/CeO2; Deposition-precipitation; Pretreatment atmosphere; H-2-TPR

摘要：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.