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Influence of pretreatment atmospheres on the activity of Au/CeO2 catalyst for low-temperature CO oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
50224 46785 2011 4 PDF Available
Title
Influence of pretreatment atmospheres on the activity of Au/CeO2 catalyst for low-temperature CO oxidation
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 H2-TPR measurement.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► Pretreatment atmospheres can affect the activity of Au/CeO2 catalysts. ► The catalyst pretreated under an oxidative atmosphere achieved a greatest activity. ► Reductive atmosphere pretreatment slightly improved the low temperature activity. ► The interaction of Au and support CeO2 was demonstrated by H2-TPR.

Keywords
Au/CeO2; Deposition–precipitation; Pretreatment atmosphere; H2-TPR
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Influence of pretreatment atmospheres on the activity of Au/CeO2 catalyst for low-temperature CO oxidation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 13, Issue 1, 5 October 2011, Pages 18–21
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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Price after discount Only $4.95
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Full-text PDF Download
Online Support
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