Hybrid Amorphous/Crystalline FeNi (Oxy) Hydroxide Nanosheets for Enhanced Oxygen Evolution

Electrons released from surface reactions need to be transferred quickly to avoid the inhibition for following reactions. Herein, a novel strategy has been demonstrated to achieve outstanding catalytic performance for oxygen evolution reaction (OER), specifically removing interfacial charges through...

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Bibliographic Details
Published in:ChemCatChem 2019-07, Vol.11 (13), p.3004-3009
Main Authors: Kong, Qingquan, Feng, Wei, Zhang, Qi, Zhang, Peng, Sun, Yan, Yin, Yichun, Wang, Qingyuan, Sun, Chenghua
Format: Article
Language:English
Subjects:
Catalysis
Catalytic activity
Crystal structure
Crystallinity
FeNiOOH
Hybrid structure
Hybrid structures
Hydroxides
Low overpotential
Nanosheets
Oxygen evolution reaction
Oxygen evolution reactions
Stability
Surface reactions
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Summary:Electrons released from surface reactions need to be transferred quickly to avoid the inhibition for following reactions. Herein, a novel strategy has been demonstrated to achieve outstanding catalytic performance for oxygen evolution reaction (OER), specifically removing interfacial charges through an optimized hybrid amorphous/crystalline FeNi (Oxy)hydroxides. Such hybrid structure offers an overpotential of only 215 mV at the current density of 10 mA cm−2 and a Tafel slope of 50.9 mV dec−1 in 1 M KOH, together with outstanding stability. The superior catalytic activity and stability can be attributed to the unique amorphous/crystalline microstructure, leading to optimized reactivity and excellent conductivity. FeNi (Oxy) hydroxides with unique amorphous/crystalline microstructure offers an overpotential of only 215 mV at the current density of 10 mA cm−2 and a Tafel slope of 50.9 mV dec−1 in 1 M KOH, together with outstanding stability. Such performance essentially origins from the optimized design, specifically with abundant active sites from amorphous layers, excellent charge transfer by crystalline layers and smooth interface, and highly conductive substrate.
ISSN:1867-3880
1867-3899
DOI:10.1002/cctc.201900718