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Dendritic core-shell nickel-iron-copper metal/metal oxide electrode for efficient electrocatalytic water oxidation
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Kemi.
KTH, Skolan för kemi, bioteknologi och hälsa (CBH), Kemi.ORCID-id: 0000-0003-4053-7147
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2018 (engelsk)Inngår i: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 9, nr 1, artikkel-id 381Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Electrochemical water splitting requires efficient water oxidation catalysts to accelerate the sluggish kinetics of water oxidation reaction. Here, we report a promisingly dendritic core-shell nickel-iron-copper metal/metal oxide electrode, prepared via dealloying with an electrodeposited nickel-iron-copper alloy as a precursor, as the catalyst for water oxidation. The as-prepared core-shell nickel-iron-copper electrode is characterized with porous oxide shells and metallic cores. This tri-metal-based core-shell nickel-iron-copper electrode exhibits a remarkable activity toward water oxidation in alkaline medium with an overpotential of only 180 mV at a current density of 10 mA cm-2. The core-shell NiFeCu electrode exhibits pH-dependent oxygen evolution reaction activity on the reversible hydrogen electrode scale, suggesting that non-concerted proton-electron transfers participate in catalyzing the oxygen evolution reaction. To the best of our knowledge, the as-fabricated core-shell nickel-iron-copper is one of the most promising oxygen evolution catalysts.

sted, utgiver, år, opplag, sider
Nature Publishing Group, 2018. Vol. 9, nr 1, artikkel-id 381
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URN: urn:nbn:se:kth:diva-222290DOI: 10.1038/s41467-017-02429-9Scopus ID: 2-s2.0-85041107994OAI: oai:DiVA.org:kth-222290DiVA, id: diva2:1180637
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QC 20180206

Tilgjengelig fra: 2018-02-06 Laget: 2018-02-06 Sist oppdatert: 2018-02-06bibliografisk kontrollert

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Zhang, PeiliChen, HongFan, LizhouZhang, BiaobiaoSheng, Xia

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