过电位
双功能
电催化剂
分解水
材料科学
贵金属
电解
兴奋剂
析氧
化学工程
纳米技术
化学
光电子学
催化作用
金属
电极
冶金
电解质
物理化学
电化学
光催化
工程类
生物化学
作者
Lei Zhang,Beiwen Lin,Suzhen Ye,Sangqi Chen,Ziqing Yao,Jiechun Lin,Xin Lin,Caili Guo,Jingying He,Yuying Chen,Yating Liu,Zena Tang,Yueyi Shen,Xiaping Li,Suqi Nie,Bang Lan,Hui Liang,Xiaohu Luo
标识
DOI:10.1016/j.jallcom.2023.170218
摘要
The design of high-effective bifunctional non-noble electrocatalysts is a feasible strategy for water electrolysis. Non-noble metal oxide Co3O4/NF is a promising electrocatalyst. However, the wide application has been limited by its poor intrinsic activity for HER. In this work, controllable disorder engineering in Co3O4 was realized by a simple Mn-doping process. As higher disorder degree, a more and more Mn2+ and Co2+-rich surfaces of Co3O4/NF can be obtained, resulting in a faster charge transfer rate and more accessible active sites because of regulating the electronic structure and forming more defects. The optimized Co3O4/NF (Mn0.8Co2.2O4/NF) shows the enhanced HER and OER activity with an overpotential as low as 154 mV and 231 mV at 10 mA·cm−2, and only needs a cell voltage of 1.56 V for overall water-splitting. In a word, high-effective bifunctional non-noble electrocatalysts have been developed by controllable disorder engineering in Mn-doped Co3O4/NF.
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