Self-supporting nanoporous CoMoP electrocatalyst for hydrogen evolution reaction in alkaline solution

Weiguo Tang; Shengli Zhu; Hui Jiang; Yanqin Liang; Zhaoyang Li; Shuilin Wu; Zhenduo Cui

doi:10.1016/j.jcis.2022.06.085

Self-supporting nanoporous CoMoP electrocatalyst for hydrogen evolution reaction in alkaline solution

J Colloid Interface Sci. 2022 Nov:625:606-613. doi: 10.1016/j.jcis.2022.06.085. Epub 2022 Jun 22.

Authors

Weiguo Tang¹, Shengli Zhu², Hui Jiang³, Yanqin Liang³, Zhaoyang Li³, Shuilin Wu³, Zhenduo Cui⁴

Affiliations

¹ School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China.
² School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China; Tianjin Key Laboratory of Composite and Functional Materials, Tianjin 300350, China; Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin, 300350, China; School of Materials Science and Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China. Electronic address: slzhu@tju.edu.cn.
³ School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China; Tianjin Key Laboratory of Composite and Functional Materials, Tianjin 300350, China; Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education, Tianjin, 300350, China.
⁴ School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China. Electronic address: zdcui@tju.edu.cn.

PMID: 35764042
DOI: 10.1016/j.jcis.2022.06.085

Abstract

Efficient catalysts with low costs are very important for hydrogen production. In this work, a nanoporous CoMoP (np-CoMoP) bimetallic phosphide catalyst with a self-supporting structure was prepared by the electrochemical dealloying method. The introduction of Mo tuned the electronic structures around Co and P, optimized the desorption of the H atom, and improved the catalytic activity of cobalt phosphide. The prepared nanoporous Co₆₅Mo₁₅P₂₀ (np-Co₆₅Mo₁₅P₂₀) structures promoted electron transfer and provided more active sites, exhibiting superior hydrogen evolution reaction (HER) performance with the overpotential of 40.8 mV at 10 mA cm^-2 and Tafel slope of 46.2 mV dec^-1 in alkaline solution. Also, the catalysts exhibited good long-term stability.

Keywords: CoMoP; Dealloying; Electrocatalysis; Hydrogen evolution reaction; Nanoporous.