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  Positive Effect of Surface Doping with Au on the Stability of Pt-Based Electrocatalysts

Gatalo, M., Jovanovič, P., Polymeros, G., Grote, J.-P., Pavlišič, A., Ruiz-Zepeda, F., et al. (2016). Positive Effect of Surface Doping with Au on the Stability of Pt-Based Electrocatalysts. ACS Catalysis, 6(3), 1630-1634. doi:10.1021/acscatal.5b02883.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-28BC-1 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-08F4-2
Genre: Journal Article

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 Creators:
Gatalo, Matija1, 2, Author              
Jovanovič, Primož1, 2, Author              
Polymeros, George3, Author              
Grote, Jan-Philipp3, Author              
Pavlišič, Andraž2, Author              
Ruiz-Zepeda, Francisco2, Author              
Šelih, Vid Simon Imon4, Author              
Šala, Martin4, Author              
Hočevar, Samo B.4, Author              
Bele, Marjan5, Author              
Mayrhofer, Karl J. J.6, 7, Author              
Hodnik, Nejc3, 8, Author              
Gaberšček, Miran1, 5, Author              
Affiliations:
1Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, Ljubljana, Slovenia, ou_persistent22              
2Laboratory for Materials Chemistry, National Institute of Chemistry, Hajdrihova 19, Ljubljana, Slovenia, ou_persistent22              
3Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863354              
4Analytical Chemistry Laboratory, National Institute of Chemistry, Hajdrihova 19, Ljubljana, Slovenia, ou_persistent22              
5National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia, ou_persistent22              
6Helmholtz-Institute Erlangen-Nuremberg for Renewable Energy (IEK-11), Forschungszentrum Jülich, Egerlandstrasse 3, 91058 Erlangen, Germany, ou_persistent22              
7Department of Chemical and Biological Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058 Erlangen, Germany , ou_persistent22              
8National Institute of Chemistry, Hajdrihova 19, Ljubljana, Slovenia, ou_persistent22              

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Free keywords: alloy; Au doping; corrosion; electrocatalyst; platinum
 Abstract: Corrosion resistance of a transition-metal-rich PtCu3/C oxygen reduction reaction (ORR) catalyst as a representative of Pt alloy-based materials has been significantly improved by doping with small amounts of gold (<1 at. %). Transmission electron microscopy imaging shows near-surface segregation of both platinum and gold with the underlying core consisting predominantly of intermetallic PtCu3. The resulting PtAu skin catalyst shows improved resistance against Cu dissolution, as well as against carbon corrosion if compared to its PtCu3 precursor. Also, it exhibits a much higher Pt and carbon stability than a widely used Pt/C standard. Most importantly, the Au doped sample shows a substantial improvement in stability at the elevated temperature (60 degrees C) degradation test (10 000 cycles; 0.4-1.2 Vim) simulating a real PEM fuel cell environment.

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Language(s): eng - English
 Dates: 2016-03-04
 Publication Status: Published in print
 Pages: 5
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: ISI: 000371755500028
DOI: 10.1021/acscatal.5b02883
 Degree: -

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Title: ACS Catalysis
  Abbreviation : ACS Catal.
Source Genre: Journal
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Publ. Info: Washington, DC : ACS
Pages: - Volume / Issue: 6 (3) Sequence Number: - Start / End Page: 1630 - 1634 Identifier: Other: 2155-5435
CoNE: /journals/resource/2155-5435