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Tuning the morphological and electronic structure of amorphous nickel-based electrocatalysts by anion regulation for water oxidation in neutral media

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Abstract

Water oxidation in near-neutral media is benign and environmentally friendly for water splitting and microbial electrolysis. Herein, various self-supporting amorphous Ni-based neutral water oxidation electrodes were fabricated by anion regulation. Among them, the Ni(OH)2/Ni:Pi electrode only needs an overpotential of 340 mV to deliver 10 mA cm−2 at pH 7.2. Stability tests show that its activity is maintained for at least 5000 s at a high current density (10 mA cm−2). This study demonstrates that high valence state Ni atoms and the Ni:Pi component are responsible for its high activity and stability, respectively.

Graphical abstract: Tuning the morphological and electronic structure of amorphous nickel-based electrocatalysts by anion regulation for water oxidation in neutral media

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Publication details

The article was received on 30 Jul 2019, accepted on 26 Aug 2019 and first published on 28 Aug 2019


Article type: Research Article
DOI: 10.1039/C9QI00953A
Inorg. Chem. Front., 2019, Advance Article

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    Tuning the morphological and electronic structure of amorphous nickel-based electrocatalysts by anion regulation for water oxidation in neutral media

    G. Yuan, Y. Hu, Q. Wang, Z. Wang, L. Wang, X. Zhang and Q. Wang, Inorg. Chem. Front., 2019, Advance Article , DOI: 10.1039/C9QI00953A

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