Modifying properties and endurance of CoP by cerium doping to enhances overall water splitting in alkaline medium

作者：Li, Shanshan; Chen, Wubing; Zhu, Yingjing; Guan, Jibiao; Wang, Lina; Guo, Baochun; Zhang, Ming^*

来源：Journal of Electroanalytical Chemistry, 2022, 922: 116748.

DOI：10.1016/j.jelechem.2022.116748

• Cobalt phosphide
• Cerium-doped
• Nested-like nanowires
• Water electrolysis

The development of efficient electrocatalyst is one of the effective ways to speed up the efficiency of water electrolysis. In this work, we prepared a nested-like Ce-doped CoP nanowires catalytic material on carbon cloth by simple hydrothermal and phosphating methods. After adjusting the doping ratio of Ce, the doping ratio (Ce/ W = 6 %) with the best performance is obtained and named as Ce-CoP NWs/CC. The Ce-CoP NWs/CC exhibits preeminent electrocatalytic activity with low overpotentials with 80 and 290 mV at 10 mA cm(-2) for HER and OER, respectively. Moreover, the Ce-CoP NWs/CC electrocatalyst also exhibits excellent electrochemical performance in overall water splitting with a low voltage of 1.506 V at 10 mA cm(-2), outperforming many reported electrocatalysts. This work provides a feasible electrocatalytic material for the introduction of rare earth elements into water electrolysis.