过电位
电催化剂
析氧
双金属片
分解水
催化作用
材料科学
化学工程
镍
热液循环
无机化学
化学
光催化
电极
冶金
有机化学
物理化学
电化学
工程类
作者
Kelin Hu,Qi Guo,Jinrong Zhou,Liping Qi,Rui Dai,Xiaoli Xiong,Zhirong Zou,Ke Huang
标识
DOI:10.1016/j.colsurfa.2022.129041
摘要
As a half-reaction in the water decomposition, the oxygen evolution reaction (OER) has limited the development and practical application of water splitting due to the kinetic speed and high overpotential. Therefore, it still exists a challenge to exploit high-performance and durable electrocatalysts for OER. Herein, a one-step hydrothermal approach was designed to prepare Co-Ni bimetallic organic frameworks (MOFs) on nickel foam (NF) substrate as a highly efficient electrocatalyst for OER under alkaline conditions. The prepared MIL-53(Co-Ni)/NF has excellent OER catalytic activity, which requires only an overpotential of 197 mV to achieve 20 mA cm−2. The proposed electrocatalyst exhibits long-term durability (>60 h) and a high turnover frequency (TOF) of 0.2806 mol O2 s−1 at 350 mV. Systematic study revealed that the coordination between Co-Ni played a significant role to improve OER performance. The present results demonstrated that bimetallic organic frameworks could be utilized to fabricate promising water-oxidation catalysts in energy conversion.
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