Structure dependency of the atomic-scale mechanisms of platinum electro-oxidation and dissolution

Fuchs T, Drnec J, Calle-Vallejo F, Stubb N, Sandbeck D, Ruge M, Cherevko S, Harrington DA, Magnussen OM (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Nature Catalysis Nature Research

DOI: 10.1038/s41929-020-0497-y

Abstract

Platinum dissolution and restructuring due to surface oxidation are primary degradation mechanisms that limit the lifetime of platinum-based electrocatalysts for electrochemical energy conversion. Here, we have studied well-defined Pt(100) and Pt(111) electrode surfaces by in situ high-energy surface X-ray diffraction, online inductively coupled plasma mass spectrometry and density functional theory calculations to elucidate the atomic-scale mechanisms of these processes. The locations of the extracted platinum atoms after Pt(100) oxidation reveal distinct differences from the Pt(111) case, which explains the different surface stability. The evolution of a specific oxide stripe structure on Pt(100) produces unstable surface atoms that are prone to dissolution and restructuring, leading to one order of magnitude higher dissolution rates. [Figure not available: see fulltext.].

Authors with CRIS profile

Daniel Sandbeck Lehrstuhl für Elektrokatalyse (HIERN)

Involved external institutions

Christian-Albrechts-Universität zu Kiel DE Germany (DE) University of Victoria (UVic) CA Canada (CA) European Synchrotron Radiation Facility (ESRF) FR France (FR) Forschungszentrum Jülich / Research Centre Jülich (FZJ) DE Germany (DE) Universitat de Barcelona (UB) / University of Barcelona ES Spain (ES)

How to cite

APA:

Fuchs, T., Drnec, J., Calle-Vallejo, F., Stubb, N., Sandbeck, D., Ruge, M.,... Magnussen, O.M. (2020). Structure dependency of the atomic-scale mechanisms of platinum electro-oxidation and dissolution. Nature Catalysis. https://doi.org/10.1038/s41929-020-0497-y

MLA:

Fuchs, Timo, et al. "Structure dependency of the atomic-scale mechanisms of platinum electro-oxidation and dissolution." Nature Catalysis (2020).

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