Carbon Doping Triggered Efficient Electrochemical Hydrogen Evolution of Cross-Linked Porous Ru-MoO 2 Via Solid-Phase Reaction Strategy

Energy & Environmental Materials

article

Jialin Cai¹  Jianye Yang¹  Xin Xie¹  Jie Ding¹  Leyan Liu¹  Wanyu Tian¹  Yushan Liu¹  Zhiyong Tang²  Baozhong Liu⁴  Siyu Lu¹ 

[1] The Green Catalysis Center, and College of Chemistry, Zhengzhou University, 100 Science Road;Henan Institute of Advanced Technology, Zhengzhou University;National Center of Nanoscience and Technology;College of Chemistry and Chemical Engineering, Henan Polytechnic University

关键词: carbon doped;    hydrogen evolution reaction;    macro–meso–micropore;    MoO2;    Ru;    solid-phase reaction;   

DOI  :  10.1002/eem2.12424

来源: Wiley

【 摘 要 】

The defect-free structure of Mo-based materials is a “double-edged sword”, which endows the material with excellent stability, but limits its chemical versatility and application in electrochemical hydrogen evolution reaction (HER). Carbon doping engineering is an attractive strategy to effectively improve the performance of Mo-based catalyst and maintain their stability. Herein, we report a cross-linked porous carbon-doped MoO2 (C–MoO2)-based catalyst Ru/C–MoO2 for electrochemical HER, which is prepared by the convenient redox solid-phase reaction (SPR) of porous RuO2/Mo2C composite precursor. Theoretical studies reveal that due to the presence of carbon atoms, the electronic structure of C–MoO2 has been properly adjusted, and the loaded small Ru nanoparticles provide a fast water dissociation rate and moderate H adsorption strength. In electrochemical studies under a pH-universal environment, Ru/C–MoO2 electrocatalyst exhibits a low overpotential at a current density of 10 mA cm−2 and has a low Tafel slope. Meanwhile, Ru/C-MoO2 has excellent stability for more than 100 h at an initial current density of 100 mA cm−2.

【 授权许可】

Unknown