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  The Impact of Antimony on the Performance of Antimony Doped Tin Oxide Supported Platinum for the Oxygen Reduction Reaction

Jalalpoor, D., Göhl, D., Paciok, P., Heggen, M., Knossalla, J., Radev, I., et al. (2021). The Impact of Antimony on the Performance of Antimony Doped Tin Oxide Supported Platinum for the Oxygen Reduction Reaction. Journal of the Electrochemical Society, 168(2): 024502. doi:10.1149/1945-7111/abd830.

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 Creators:
Jalalpoor, Daniel1, Author              
Göhl, Daniel2, Author              
Paciok, Paul3, Author              
Heggen, Marc3, Author              
Knossalla, Johannes1, Author              
Radev, Ivan4, Author
Peinecke, Volker4, Author
Weidenthaler, Claudia5, Author              
Mayrhofer, Karl J. J.2, 6, Author              
Ledendecker, Marc2, 7, Author              
Schüth, Ferdi1, Author              
Affiliations:
1Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445589              
2Electrocatalysis, Interface Chemistry and Surface Engineering, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_1863354              
3Ernst-Ruska Centre for Microscopy and Spectroscopy with Electrons, Peter Grünberg Institute, Forschungszentrum Jülich, Jülich, 52425, Germany, ou_persistent22              
4The Hydrogen and Fuel Cell Center (ZBT GmbH), 47057 Duisburg, Germany, ou_persistent22              
5Research Group Weidenthaler, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950291              
6Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), 91058 Erlangen, Germany, ou_persistent22              
7Department of Technical Chemistry, Technical University Darmstadt, 64287 Darmstadt, Germany , ou_persistent22              

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 Abstract: Antimony doped tin oxide (ATO) supported platinum nanoparticles are considered a more stable replacement for conventional carbon supported platinum materials for the oxygen reduction reaction. However, the interplay of antimony, tin and platinum and its impact on the catalytic activity and durability has only received minor attention. This is partly due to difficulties in the preparation of morphology- and surface-area-controlled antimony-doped tin oxide materials. The presented study sheds light onto catalyst–support interaction on a fundamental level, specifically between platinum as a catalyst and ATO as a support material. By using a previously described hard-templating method, a series of morphology controlled ATO support materials for platinum nanoparticles with different antimony doping concentrations were prepared. Compositional and morphological changes before and during accelerated stress tests are monitored, and underlying principles of deactivation, dissolution and catalytic performance are elaborated. We demonstrate that mobilized antimony species and strong metal support interactions lead to Pt/Sb alloy formation as well as partially blocking of active sites. This has adverse consequences on the accessible platinum surface area, and affects negatively the catalytic performance of platinum. Operando time-resolved dissolution experiments uncover the potential boundary conditions at which antimony dissolution can be effectively suppressed and how platinum influences the dissolution behavior of the support.

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Language(s): eng - English
 Dates: 2020-10-122021-02-02
 Publication Status: Published online
 Pages: 9
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1149/1945-7111/abd830
 Degree: -

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Title: Journal of the Electrochemical Society
  Abbreviation : J. Electrochem. Soc.
Source Genre: Journal
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Publ. Info: New York, NY, USA : Electrochemical Society
Pages: - Volume / Issue: 168 (2) Sequence Number: 024502 Start / End Page: - Identifier: ISSN: 0013-4651
CoNE: https://pure.mpg.de/cone/journals/resource/991042748197686