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Dendritic core-shell nickel-iron-copper metal/metal oxide electrode for efficient electrocatalytic water oxidation.

Abstract：

: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.

journal_name

Nat Commun

journal_title

Nature communications

authors

Zhang P,Li L,Nordlund D,Chen H,Fan L,Zhang B,Sheng X,Daniel Q,Sun L

doi

10.1038/s41467-017-02429-9

subject

Has Abstract

pub_date

2018-01-26 00:00:00

pages

381

issue

1

issn

2041-1723

pii

10.1038/s41467-017-02429-9

journal_volume

9

pub_type

杂志文章

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