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Issue 32, 2020
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Autogenous growth of the hierarchical V-doped NiFe layer double metal hydroxide electrodes for an enhanced overall water splitting

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Abstract

NiFe layer double metal hydroxide nanosheets (NiFe LDHs) have been extensively investigated as one of the best promising candidates to construct efficient bifunctional catalysts. In this research, element (vanadium) doping into NiFe LDHs grown in nickel foam were synthesized by the one-step method and applied in overall water splitting. The content and structure of the composites were adjusted to regulate the catalyst's electronic structure and reduce the onset potential and achieved unprecedented electrocatalysis for OER and HER. The V-NiFe-LDH/NF showed perfect OER and HER activities with low Tafel slopes of 31.3 and 89.8 mV dec−1, and small overpotentials of 195 and 120 mV at 10 mA cm−2 in 1.0 m KOH solution, respectively. Electrochemical analysis indicated that the efficient catalytic activity of V-NiFe-LDHs/NF mainly benefited from V doping, which optimized the electronic structure and produce defects, thereby resulting in an enhanced conductivity, facile electron transfer, and adequate active sites.

Graphical abstract: Autogenous growth of the hierarchical V-doped NiFe layer double metal hydroxide electrodes for an enhanced overall water splitting

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Article information


Submitted
26 Apr 2020
Accepted
10 Jul 2020
First published
22 Jul 2020

Dalton Trans., 2020,49, 11217-11225
Article type
Paper

Autogenous growth of the hierarchical V-doped NiFe layer double metal hydroxide electrodes for an enhanced overall water splitting

J. Liang, H. Shen, Y. Ma, D. Liu, M. Li, J. Kong, Y. Tang and S. Ding, Dalton Trans., 2020, 49, 11217
DOI: 10.1039/D0DT01520B

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