Formation of unexpectedly active Ni-Fe oxygen evolution electrocatalysts by physically mixing Ni and Fe oxyhydroxides

We present an unusual, yet facile, strategy towards formation of physically mixed Ni-Fe(OxHy) oxygen evolution electrocatalysts. We use in situ X-ray absorption and UV-vis spectroscopy, and high-resolution imaging to demonstrate that physical contact between two inferior Ni(OH)2 and Fe(OOH) catalyst...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2019, Vol.55 (6), p.818-821
Main Authors: Görlin, Mikaela, Chernev, Petko, Paciok, Paul, Tai, Cheuk-Wai, Ferreira de Araújo, Jorge, Reier, Tobias, Heggen, Marc, Dunin-Borkowski, Rafal, Strasser, Peter, Dau, Holger
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Chemical evolution
Computer simulation
Computing time
Electrocatalysts
Electrochemical analysis
Image resolution
Iron
Nickel
X ray absorption
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Summary:We present an unusual, yet facile, strategy towards formation of physically mixed Ni-Fe(OxHy) oxygen evolution electrocatalysts. We use in situ X-ray absorption and UV-vis spectroscopy, and high-resolution imaging to demonstrate that physical contact between two inferior Ni(OH)2 and Fe(OOH) catalysts self-assemble into atomically intermixed Ni-Fe catalysts with unexpectedly high activity.
ISSN:1359-7345
1364-548X
1364-548X
DOI:10.1039/c8cc06410e