Keywords

bimetallic nickel–cobalt electrocatalyst, ultrathin NiCo(OH)x nanosheets, energy-efficient electrolysis, electrocatalyst engineering

Abstract

In order to decrease the electricity consumption of hydrogen generation, hydrazine-assisted water electrolysis is intensively investigated recently. Herein, hierarchical nanostructure of ultrathin NiCo(OH)x nanosheets (NSs) that in-situ grown on the NiCoP nanowires (NWs) was deposited on nickel foam (NF) to construct NiCo(OH)x@NiCoP/NF electrode. NiCoP NWs extend the surface area, spatial utilization of NF and enhance the electron conduction to the outmost NiCo(OH)x NSs. NiCo(OH)x NSs interlace to form regular mesoporous channels, which improve the structural stability and mass transfer rate. Moreover, NiCoP NWs enhance the adsorption of protons and the transfer of electrons, while NiCo(OH)x NSs facilitate the adsorption of OHad during reaction. As a result, NiCo(OH)x@NiCoP/NF exhibits excellent activity for both hydrazine oxidation reaction (HzOR) and hydrogen evolution reaction (HER). Based on the NiCo(OH)x@NiCoP/NF||NiCo(OH)x@NiCoP/NF couples, electrolysis of hydrazine for hydrogen generation only requires an extremely low cell voltage of 0.03 V.

Original Publication Citation

M. Li, Z. Zhang, H. Xiong, L. Wang, S. Zhuang, M. D. Argyle, Y. Tang, X. Yang, Y. Chen, P. Wan, M. Fan, ChemElectroChem 2020, 7, 3089.

Document Type

Peer-Reviewed Article

Publication Date

2020-07-06

Publisher

ChemElectroChem

Language

English

College

Ira A. Fulton College of Engineering

Department

Chemical Engineering

University Standing at Time of Publication

Associate Professor

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