文献类型：期刊文献

英文题名：Construction of La decorated CoMoP composite and its highly efficient electrocatalytic activity for overall water splitting in alkaline media

作者：Li, Liang[1];Chao, Kai[1];Liu, Xiaowei[1];Zhou, Siyue[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

年份：2023

卷号：941

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20230613540238);WOS:【SCI-EXPANDED(收录号:WOS:000927039900001)】；

语种：英文

外文关键词：Overall water splitting; Phosphide; La; Electrocatalysis; Doping

摘要：A series of ultra-evenly La-decorated CoMoP composites have been fabricated by a selective corrosion and sequential in situ phosphorization strategy using La-doped Co-ZIF-67 as precursors. The electrochemical performance showed that introducing La ions within transition metal phosphides' structure could effectively optimize the electronic configuration and result in an excellent bifunctional electrocatalyst for overall water splitting. Along with the increased La doping content to 10 %, the catalytic activities of the composites for hydrogen evolution reaction (HER), and oxygen evolution reaction (OER) all tended to increase initially and then decrease. Among all the synthesized La-decorated CoMoP materials, the 5 % La-doped composite presented the most excellent HER and OER performance in 1 M KOH. The overpotential could reach 49 mV for HER and 250 mV for OER at 10 mAmiddotcm-2, respectively. In addition, when employed as both anode and cathode to assemble an alkaline electrolyzer, it only required a cell voltage of 1.56 V to achieve a current density of 10 mAmiddotcm-2, which is superior to the most reported precious-metal-free bifunctional catalysts. More importantly, the electrolyzer could maintain a stable water-splitting current density of 10 mAmiddotcm-2 for at least 24 h without any deviation, highlighting its potential for practical applications.(c) 2023 Elsevier B.V. All rights reserved.