Oxygen Evolution Activity on NiOOH Catalysts: Four-Coordinated Ni Cation as the Active Site and the Hydroperoxide Mechanism

The NiOOH catalyst as obtained dynamically from electrodeposition of Ni2+(aq) in the borate-containing electrolyte was observed to exhibit much higher oxygen evolution activity at a near-neutral pH range (7–9) compared to other NiO x -based materials. Here, we demonstrate that this intriguing high a...

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Bibliographic Details
Published in:ACS catalysis 2020-02, Vol.10 (4), p.2581-2590
Main Authors: Li, Li-Fen, Li, Ye-Fei, Liu, Zhi-Pan
Format: Article
Language:English
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Summary:The NiOOH catalyst as obtained dynamically from electrodeposition of Ni2+(aq) in the borate-containing electrolyte was observed to exhibit much higher oxygen evolution activity at a near-neutral pH range (7–9) compared to other NiO x -based materials. Here, we demonstrate that this intriguing high activity is owing to the high concentration of Ni cationic vacancy on the nascent ultra-small NiOOH particles (
ISSN:2155-5435
2155-5435
DOI:10.1021/acscatal.9b04975