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In situ analysis of catalytically active Pd surfaces for CO oxidation with near ambient pressure XPS

Paper ID Volume ID Publish Year Pages File Format Full-Text
53354 46964 2016 7 PDF Available
Title
In situ analysis of catalytically active Pd surfaces for CO oxidation with near ambient pressure XPS
Abstract

•Recent studies on CO oxidation on Pd surfaces with NAP-XPS were reviewed.•Catalytically active phases on the Pd surfaces were characterized.•All the catalytically active phases include surface-segregated high-density oxygen.•Reaction kinetics on the Pd surfaces under NAP and UHV conditions were compared.

X-ray photoelectron spectroscopy (XPS) is useful for in situ analysis of catalytically active surfaces under reaction conditions. We conducted in situ observations of CO oxidation on Pd single-crystal surfaces with different orientations under near ambient pressure (NAP) conditions with XPS. In this short review we compare catalytically active surfaces of Pd with the different orientations. Both surface oxides and atomic oxygen chemisorbed on metallic surfaces can be active for CO oxidation depending on surface geometric structure. We propose similarity between the surface oxides and the chemisorbed oxygen from a viewpoint of availability of active oxygen. Catalytic activity of the metallic surface under NAP condition is also compared with that under ultrahigh vacuum conditions.

Graphical abstractIn situ analysis for CO oxidation on Pd surfaces under near ambient pressure conditions with XPS and mass spectroscopy reveals catalytically active phases.Figure optionsDownload full-size imageDownload high-quality image (189 K)Download as PowerPoint slide

Keywords
Ambient pressure XPS; In-situ observation; CO oxidation
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In situ analysis of catalytically active Pd surfaces for CO oxidation with near ambient pressure XPS
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 260, 1 February 2016, Pages 14–20
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