DataVXACS Applied Materials & InterfacesPaper
journal article·2023-11-08Open access

Oxidation of Aqueous Phosphorous Acid Electrolyte in Contact with Pt Studied by X-ray Photoemission Spectroscopy

Romualdus Enggar Wibowo, Raul Garcia-Diez, Tomas Bystron, Martin Prokop, Marianne van der Merwe, Mauricio D. Arce, Catalina E. Jiménez, Tzung-En Hsieh, Johannes Frisch, Alexander Steigert, Marco Favaro, David E. Starr, Regan G. Wilks, Karel Bouzek, Marcus Bär

ACS Applied Materials & Interfaces· Volume 15· Issue 44
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Source abstract

Abstract

High Resolution Image Download MS PowerPoint Slide The oxidation of the aqueous H 3 PO 3 in contact with Pt was investigated for a fundamental understanding of the Pt/aqueous H 3 PO 3 interaction with the goal of providing a comprehensive basis for the further optimization of high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs). Ion-exchange chromatography (IEC) experiments suggested that in ambient conditions, Pt catalyzes H 3 PO 3 oxidation to H 3 PO 4 with H 2 O. X-ray photoelectron spectroscopy (XPS) on different substrates, including Au and Pt, previously treated in H 3 PO 3 solutions was conducted to determine the catalytic abilities of selected metals toward H 3 PO 3 oxidation. In situ ambient pressure hard X-ray photoelectron spectroscopy (AP-HAXPES) combined with the “dip-and-pull” method was performed to investigate the state of H 3 PO 3 at the Pt|H 3 PO 3 interface and in the bulk solution. It was shown that whereas H 3 PO 3 remains stable in the bulk solution, the catalyzed oxidation of H 3 PO 3 by H 2 O to H 3 PO 4 accompanied by H 2 generation occurs in contact with the Pt surface. This catalytic process likely involves H 3 PO 3 adsorption at the Pt surface in a highly reactive pyramidal tautomeric configuration.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storagePolymersCatalysis & surfaces

OpenAlex topics: Fuel Cells and Related Materials · Electrocatalysts for Energy Conversion · Electrochemical Analysis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Dept. Interface Design, Helmholtz-Zentrum Berlin (HZB) für Materialien und Energie GmbH, Albert-Einstein-Str. 15, 12489 Berlin, Germany

Department of Inorganic Technology, University of Chemistry and Technology Prague, Technicka 5, Prague 6 166 28, Czech Republic

Departamento Caracterización de Materiales, INN-CNEA-CONICET, Centro Atómico Bariloche, Av. Bustillo 9500, S. C. de Bariloche, Rio Negro 8400, Argentina

Energy Materials In-situ Laboratory Berlin (EMIL), HZB, Albert-Einstein-Str. 15, 12489 Berlin, Germany

Institute for Nanospectroscopy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB), Albert-Einstein-Str. 15, 12489Berlin,Germany

Institute for Solar Fuels, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB), Hahn-Meitner-Platz 1, 14109Berlin, Germany

Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Egerlandstr. 3, 91058 Erlangen, Germany

Department of X-ray Spectroscopy at Interfaces of Thin Films, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (HI ERN), Albert-Einstein-Str. 15, 12489 Berlin, Germany

Funding

Bundesministerium für Bildung und Forschung · Dahlem Research School, Freie Universität Berlin · European Regional Development Fund · Deutsche Forschungsgemeinschaft · Grantová Agentura Ceské Republiky · Helmholtz Energy Materials Foundry

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