Hierarchical Mo-doped CoP3 interconnected nanosheet arrays on carbon cloth as an efficient bifunctional electrocatalyst for water splitting in an alkaline electrolyte

Shasha Zhang; Mingjing Guo; Shuyi Song; Ke Zhan; Ya Yan; Junhe Yang; Bin Zhao

doi:10.1039/d0dt00671h

Hierarchical Mo-doped CoP₃ interconnected nanosheet arrays on carbon cloth as an efficient bifunctional electrocatalyst for water splitting in an alkaline electrolyte

Dalton Trans. 2020 May 7;49(17):5563-5572. doi: 10.1039/d0dt00671h. Epub 2020 Apr 9.

Authors

Shasha Zhang¹, Mingjing Guo, Shuyi Song, Ke Zhan, Ya Yan, Junhe Yang, Bin Zhao

Affiliation

¹ School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China. zhaobin@usst.edu.cn.

PMID: 32270158
DOI: 10.1039/d0dt00671h

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, and reasonable stability up to 20 h in 1.0 M KOH. Impressively, when 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 achieved at a cell voltage of only 1.65 V, and the stable water-splitting current is maintained for 25 h, showing great promise for practical applications.