An Unconventional Iron Nickel Catalyst for the Oxygen Evolution Reaction

The oxygen evolution reaction (OER) is a key process that enables the storage of renewable energies in the form of chemical fuels. Here, we describe a catalyst that exhibits turnover frequencies higher than state-of-the-art catalysts that operate in alkaline solutions, including the benchmark nickel...

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Bibliographic Details
Published in:ACS central science 2019-03, Vol.5 (3), p.558-568
Main Authors: Song, Fang, Busch, Michael M, Lassalle-Kaiser, Benedikt, Hsu, Chia-Shuo, Petkucheva, Elitsa, Bensimon, Michaël, Chen, Hao Ming, Corminboeuf, Clemence, Hu, Xile
Format: Article
Language:English
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Summary:The oxygen evolution reaction (OER) is a key process that enables the storage of renewable energies in the form of chemical fuels. Here, we describe a catalyst that exhibits turnover frequencies higher than state-of-the-art catalysts that operate in alkaline solutions, including the benchmark nickel iron oxide. This new catalyst is easily prepared from readily available and industrially relevant nickel foam, and it is stable for many hours. Operando X-ray absorption spectroscopic data reveal that the catalyst is made of nanoclusters of γ-FeOOH covalently linked to a γ-NiOOH support. According to density functional theory (DFT) computations, this structure may allow a reaction path involving iron as the oxygen evolving center and a nearby terrace O site on the γ-NiOOH support oxide as a hydrogen acceptor.
ISSN:2374-7943
2374-7951
2374-7951
DOI:10.1021/acscentsci.9b00053