塔菲尔方程
析氧
电催化剂
催化作用
分解水
电解质
化学工程
材料科学
氧气
纳米颗粒
金属
无机化学
化学
电化学
纳米技术
电极
冶金
物理化学
生物化学
有机化学
光催化
工程类
作者
Hui Cheng,Yan Gao,F. Wang,Tong Yang,Long Huang,Jiang Tang,Rong Hu
标识
DOI:10.1016/j.jallcom.2023.172820
摘要
The construction of highly active non-precious metal-based oxygen evolution reaction (OER) electrocatalysts is demanded in energy storage applications, such as fuel cells, water splitting and metal-air batteries. In this study, CeOx/TbCoP electrocatalysts were obtained by hydrothermal hydrolysis of metal precursors, followed by phosphorylation. Rich oxygen vacancies were formed after doping of rare earth metal element, which improved the electron transfer efficiency, and enhanced the catalytic activity and stability. In alkaline electrolyte (1 M KOH), CeOx/TbCoP exhibited outstanding OER performance, with overpotentials of only 358 mV and 372 mV at current densities of 50 mA∙cm-2 and 100 mA∙cm-2, respectively. A Tafel slope as low as 43 mV∙dec−1, and the turnover frequency (TOF) is as high as 0.101 s-1. Additionally, the catalysts demonstrated negligible decay during the 100 hours durability test at 10 mA∙cm-2. These exciting results indicate that CeOx/TbCoP is a highly-promising electrocatalyst for water splitting.
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