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          Institute: Fritz-Haber-Institut     Collection: Inorganic Chemistry     Display Documents

ID: 475885.0, Fritz-Haber-Institut / Inorganic Chemistry
A comparative in situ XPS study of PtRuCo catalyst in methanol steam reforming and water gas shift reactions
Authors:Zafeiratos, Spiros; Paloukis, F.; Papakonstantinou, G.; Teschner, Detre; Hävecker, Michael; Vass, Elaine; Schnörch, Peter; Knop-Gericke, Axel; Schlögl, Robert; Moreno, B.; Chinarro, E.; Jurado, J. R.; Neophytides, S. D.
Research Context:methanol steam reforming
Date of Publication (YYYY-MM-DD):2010-11-17
Title of Journal:Catalysis Today
Journal Abbrev.:Catal. Today
Issue / Number:1-4
Start Page:250
End Page:256
Copyright:© 2010 Elsevier B.V. All rights reserved.
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:In the present study the oxidation state and the surface composition of a ternary PtRuCo catalyst were investigated under methanol steam reforming (SRM) and water gas shift (WGS) reaction conditions at 570 K. Ambient pressure X-ray photoelectron spectroscopy (APPES) was applied in situ at 0.5 mbar, while simultaneously monitoring the catalytic activity of the sample by on-line mass spectrometry. Non-destructive depth profile measurements performed under SRM reaction conditions over a polycrystalline PtCo foil, were also used to obtain detailed depth-resolved information. The results showed that surface segregation of cobalt and modification of its oxidation state occurs when switching from SRM to WGS reaction conditions. Evidence of ionic Pt was found only during WGS reaction, while Ru was mainly present in the metallic state. The results clearly demonstrate the dynamic response of the PtRuCo catalytic surface to the reaction atmosphere.
Free Keywords:Direct methanol fuel cells; Ambient pressure photoelectron spectroscopy; Methanol steam reforming reaction; Water gas shift reaction; PtRuCo catalyst
External Publication Status:published
Document Type:Article
Communicated by:Robert Schlögl
Affiliations:Fritz-Haber-Institut/Inorganic Chemistry/Electronic Structure and Adsorption / Metals
Fritz-Haber-Institut/Inorganic Chemistry/Inorganic Chemistry
External Affiliations:LMSPC, UMR 7515 du CNRS, 25 Rue Becquerel, 67087 Strasbourg, France
ICEHT-FORTH, GR-26504 Rion, Achaias, Greece
Instituto de Cerámica y Vidrio, CSIC. Cam. de Cantoblanco, C/Kelsen 5, 28049 Madrid, Spain
Identifiers:URL:http://dx.doi.org/10.1016/j.cattod.2010.03.030 [only for subscriber]
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