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Preferential CO oxidation in hydrogen (PROX) on unsupported PtSn catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
41266 45883 2012 4 PDF Available
Title
Preferential CO oxidation in hydrogen (PROX) on unsupported PtSn catalyst
Abstract

PROX reaction was studied over an unsupported PtSn catalyst. CO2 and H2O were produced from a H2 flow containing 1% CO, and 0.4–2% O2. PtSn pretreated with O2 and H2 contained more Pt in the near-surface region and was more active towards CO oxidation than a sample pretreated in H2 only. In situ XPS was also carried out during PROX reaction. Sn 3d indicated the presence of Sn-oxides, near to the surface region, along with Pt3Sn. Pt 4f peak showed metallic Pt under all conditions. Water and OH enrichment was observed in the O 1s spectrum, taken during PROX reaction.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (229 K)Download as PowerPoint slideHighlights► Unsupported PtSn was more active catalyst in PROX than Pt black. ► Pretreatment by H2 and by O2–H2 increased activity. ► PROX activity had a sharp maximum at about 400 K. ► In situ XPS: Pt 4f showed Pt0, Sn 3d contained Sn0 and Sn oxides. ► Whenever surface OH, H2O are present, PROX reaction is more rapid.

Keywords
PROX reaction; PtSn catalyst; In situ XPS
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Preferential CO oxidation in hydrogen (PROX) on unsupported PtSn catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 411–412, 16 January 2012, Pages 31–34
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
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Any Questions? feel free to contact us