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

Jalalpoor, Daniel ; Göhl, Daniel ; Paciok, Paul ; Heggen, Marc ; Knossalla, Johannes ; Radev, Ivan ; Peinecke, Volker ; Weidenthaler, Claudia ; Mayrhofer, Karl J. J. ; Ledendecker, Marc ; Schüth, Ferdi (2024)
The Impact of Antimony on the Performance of Antimony Doped Tin Oxide Supported Platinum for the Oxygen Reduction Reaction.
In: Journal of The Electrochemical Society, 2021, 168 (2)
doi: 10.26083/tuprints-00020397
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Item Type: Article
Type of entry: Secondary publication
Title: The Impact of Antimony on the Performance of Antimony Doped Tin Oxide Supported Platinum for the Oxygen Reduction Reaction
Language: English
Date: 19 March 2024
Place of Publication: Darmstadt
Year of primary publication: 2021
Place of primary publication: Bristol
Publisher: IOP Publishing
Journal or Publication Title: Journal of The Electrochemical Society
Volume of the journal: 168
Issue Number: 2
Collation: 9 Seiten
DOI: 10.26083/tuprints-00020397
Corresponding Links:
Origin: Secondary publication DeepGreen
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.

Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-203970
Classification DDC: 500 Science and mathematics > 540 Chemistry
Divisions: 07 Department of Chemistry > Ernst-Berl-Institut > Fachgebiet Technische Chemie
Date Deposited: 19 Mar 2024 10:19
Last Modified: 20 Jun 2024 13:41
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20397
PPN: 519245458
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