Journal of Inorganic Materials ›› 2022, Vol. 37 ›› Issue (5): 541-546.DOI: 10.15541/jim20210280

Special Issue: 【虚拟专辑】计算材料

• RESEARCH ARTICLE • Previous Articles     Next Articles

Theoretical Investigation of Mo Doped α-MnO2 Electrocatalytic Oxygen Evolution Reaction

WANG Peng(), JIN Zunlong(), CHEN Ningguang, LIU Yonghao   

  1. School of Mechanical and Power Engineering, Zhengzhou University, Zhengzhou 450001, China
  • Received:2021-04-29 Revised:2021-06-07 Published:2022-05-20 Online:2021-05-20
  • Contact: JIN Zunlong, professor. E-mail: zljin@zzu.edu.cn
  • About author:WANG Peng (1995-), male, Master candidate. E-mail: 770352508@qq.com
  • Supported by:
    National Natural Science Foundation of China(21676257)

Abstract:

Oxygen evolution reaction (OER) plays an important role in solving energy shortage and environmental problems, but it requires a huge overpotential to overcome the slow kinetic barriers, so the development of high- efficiency electrocatalysts has become an indispensable step. In this work, the performance of α-MnO2(001) and Mo doped α-MnO2(001) electrocatalytic oxygen evolution reaction were studied by using density functional theory. Gibbs free energy, density of states and differential charge density were calculated according to the reaction path. The research results show that Mo doping can effectively modulate the electronic structure of α-MnO2(001) surface, improve desorption and adsorption capacity between intermediates and the catalyst, and provide more electrons for OER. Gibbs free energy calculation results indicate that the formation of O2 from *OOH is the rate-determining step for OER in the Mo doped α-MnO2(001) system. Mo doping reduces the overpotential to 1.01 V, which presents a good catalytic performance for oxygen evolution.

Key words: oxygen evolution reaction, density functional theory, Gibbs free energy, catalytic activity

CLC Number: