用于碱性溶液中析氢反应的自支撑纳米多孔CoMoP电催化剂。

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

作者信息

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

机构信息

School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China.

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.

出版信息

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

DOI:10.1016/j.jcis.2022.06.085

PMID:35764042

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 CoMoP (np-CoMoP) 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 and Tafel slope of 46.2 mV dec in alkaline solution. Also, the catalysts exhibited good long-term stability.

摘要

低成本的高效催化剂对于制氢非常重要。在本工作中，通过电化学脱合金化方法制备了具有自支撑结构的纳米多孔CoMoP（np-CoMoP）双金属磷化物催化剂。Mo的引入调节了Co和P周围的电子结构，优化了H原子的脱附，并提高了磷化钴的催化活性。制备的纳米多孔CoMoP（np-CoMoP）结构促进了电子转移并提供了更多活性位点，在碱性溶液中表现出优异的析氢反应（HER）性能，在10 mA cm时过电位为40.8 mV，塔菲尔斜率为46.2 mV dec。此外，该催化剂还表现出良好的长期稳定性。