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Hierarchical Mo-doped CoP3 Interconnected Nanosheet Arrays on Carbon Cloth as an Efficient Bifunctional Electrocatalyst for Water Splitting in Alkaline Electrolyte

Abstract

Design and fabrication of highly efficient and robust noble-metal-free bifunctional electrocatalysts for overall water splitting in alkaline media is challenging. Herein, we report a unique bifunctional electrocatalyst consisting of three-dimensional (3D) hierarchical Mo-doped CoP3 nanosheet arrays on carbon cloth (Mo-CoP3 NAs@CC) fabricated by a facile electrodeposition process and the subsequent PH3 plasma-assisted phosphorization. Benefiting from the hierarchical nanostructure and doping effect of Mo, the optimal Mo-CoP3-2@CC electrode demonstrates excellent HER and OER catalytic activity with an overpotential of 62 and 300 mV at 10 mA cm-2, respectively, as well as the reasonable stability up to 20 h in 1.0 M KOH. Impressively, when the Mo-CoP3-2@CC is used as both HER and OER electrodes in an alkaline electrolyzer, a current density of 10 mA cm-2 is reached at the cell voltage of only 1.65 V, and the stable water-splitting current is maintained for 25 h, showing the great promise for practical application.

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Article information


Submitted
22 Feb 2020
Accepted
23 Mar 2020
First published
24 Mar 2020

Dalton Trans., 2020, Accepted Manuscript
Article type
Paper

Hierarchical Mo-doped CoP3 Interconnected Nanosheet Arrays on Carbon Cloth as an Efficient Bifunctional Electrocatalyst for Water Splitting in Alkaline Electrolyte

S. Zhang, M. Guo, S. Song, K. Zhan, Y. Yan, J. Yang and B. Zhao, Dalton Trans., 2020, Accepted Manuscript , DOI: 10.1039/D0DT00671H

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