Rare-Earth Elements Modified 1T Phase Mos2 Synergy with Defects for Enhanced Hydrogen Evolution

2018 4th International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Sun, Kaian^1 ; Liu, Yunqi^1 ; Liu, Chenguang^1

State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), 66 West Changjiang Road, Qingdao

266580, China^1

关键词: Edge sites;    Hydrogen evolution;    Hydrogen evolution reactions;    Overpotential;    Renewable energies;    State of the art;    T-phase;    Theoretical calculations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/252/2/022136/pdf
DOI  :  10.1088/1755-1315/252/2/022136

来源: IOP

【 摘 要 】

Earth-abundant MoS2 has drawn continuous attentions in many fields, especially hydrogen evolution reaction (HER), which has been regarded as an effective technology for renewable energy. However, its activity is limited by edge sites, to the disadvantage of atomic economy. Herein, combination with theoretical calculation, we propose that rare-earth element (Ce, La, and Tb) synergy with defect can optimize bulk site of MoS2 for HER. Furthermore, self-supporting electrode was designed for integrating the optimized activity site, leading to an excellent HER performance. Compared to La, Tb, and pristine MoS2, the Ce-based MoS2 synergy with defect has a better activity with an overpotential of 165 mV to achieve 100 mA cm-2, close to the state-of-the-art noble metal Pt.