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Ge-modified Pt/SiO2 catalysts used in preferential CO oxidation (CO-PROX)

Paper ID Volume ID Publish Year Pages File Format Full-Text
51838 46856 2011 6 PDF Available
Title
Ge-modified Pt/SiO2 catalysts used in preferential CO oxidation (CO-PROX)
Abstract

A bimetallic PtGe catalyst was prepared by a controlled surface reaction and studied for the PROX reaction. The good activity of the bimetallic catalyst can be assigned to the presence of a “noble metal-oxidized metal promoter” ensemble site in close contact, the noble metal (Pt) being the CO adsorption site and the oxidized metal promoter (Ge) the O2 adsorption site. The stability of the PtGe clusters is confirmed by the EXAFS spectra and activity measurements in the preferential oxidation reaction that show similar values for samples subjected to different oxidation–reduction cycles.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights► PtGe catalyst presents a "noble metal-oxidized metal promoter" ensemble site. ► Pt is the CO adsorption site and the GeOx the O2 adsorption site. ► The stability of the PtGe clusters is confirmed by EXAFS and activity measurements. ► PtGe systems, unlike PtSn systems, do not show alloy formation. ► Electronic effect with charge transfer from Pt to Ge is evidenced by XANES spectra.

Keywords
PROX; Bimetallic catalysts; PtGe; SOMC/M; EXAFS/XANES
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Ge-modified Pt/SiO2 catalysts used in preferential CO oxidation (CO-PROX)
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 12, Issue 14, 15 August 2011, Pages 1280–1285
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us