Issue 11, 2019

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

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

Supplementary files

Article information

Article type
Research Article
Submitted
30 Jul 2019
Accepted
26 Aug 2019
First published
28 Aug 2019

Inorg. Chem. Front., 2019,6, 3093-3096

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, 6, 3093 DOI: 10.1039/C9QI00953A

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