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Schlagwörter	Chemistry ; QD1-999
Sprache	Englisch
Erscheinungsdatum	2023-09-01T00:00:00Z
Verlag	American Chemical Society
Dokumenttyp	Artikel ; Online
Datenquelle	BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

Artikel: Stability and Catalytic Performance of Reconstructed Fe₃O₄(001) and Fe₃O₄(110) Surfaces during Oxygen Evolution Reaction

Müllner, Matthias / Michele Riva / Florian Kraushofer / Michael Schmid / Gareth S. Parkinson / Stijn F. L. Mertens / Ulrike Diebold

Journal of physical chemistry. 2018 Oct. 29, v. 123, no. 13

2018

Abstract: Earth-abundant oxides are promising candidates as effective and low-cost catalysts for the oxygen evolution reaction (OER) in alkaline media, which remains one of the bottlenecks in electrolysis and artificial photosynthesis. A fundamental understanding ... ...

Abstract	Earth-abundant oxides are promising candidates as effective and low-cost catalysts for the oxygen evolution reaction (OER) in alkaline media, which remains one of the bottlenecks in electrolysis and artificial photosynthesis. A fundamental understanding of the atomic-scale reaction mechanism during OER could drive further progress, but a stable model system has yet to be provided. Here we show that Fe₃O₄ single crystal surfaces, prepared in ultrahigh vacuum (UHV) are stable in alkaline electrolytein the range pH 7–14 and under OER conditions in 1 M NaOH. Fe₃O₄(001) and Fe₃O₄(110) surfaces were studied with X-ray photoelectron spectroscopy, low-energy electron diffraction, and scanning tunneling microscopy in UHV, and atomic force microscopy in air. Fe₃O₄(110) is found to be more reactive for oxidative water splitting than (001)-oriented magnetite samples. Magnetite is electrically conductive, and the structure and properties of its major facets are well understood in UHV. With these newly obtained results, we propose magnetite (Fe₃O₄) as a promising model system for further mechanistic studies of electrochemical reactions in alkaline media and under highly oxidizing conditions.
Schlagwörter	X-ray photoelectron spectroscopy ; air ; atomic force microscopy ; catalysts ; catalytic activity ; electrochemistry ; electrolysis ; magnetite ; models ; oxygen production ; pH ; photosynthesis ; physical chemistry ; reaction mechanisms ; scanning tunneling microscopy ; sodium hydroxide
Sprache	Englisch
Erscheinungsverlauf	2018-1029
Umfang	p. 8304-8311.
Erscheinungsort	American Chemical Society
Dokumenttyp	Artikel
ISSN	1932-7455
DOI	10.1021/acs.jpcc.8b08733
Datenquelle	NAL Katalog (AGRICOLA)

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Artikel: Stability and Catalytic Performance of Reconstructed Fe₃O₄(001) and Fe₃O₄(110) Surfaces during Oxygen Evolution Reaction

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