Charge Engineering of Mo2C@Defect-Rich N-Doped Carbon Nanosheets for Efficient Electrocatalytic H2 Evolution

Nano-Micro Letters

Yin Chen¹  Yi Zhang¹  Qingguo Feng²  Jiaqian Qin³  Yongpeng Lei⁴  Chunsheng Lei⁴  Wen Zhou⁴ 

[1] Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University;Key Laboratory of Advanced Technologies of Materials, Ministry of Education, and Institute of Materials Dynamics, Southwest Jiaotong University;Metallurgy and Materials Science Research Institute, Chulalongkorn University;State Key Laboratory of Powder Metallurgy, Central South University;

关键词: Molybdenum carbide;    Nitrogen-doped carbon nanosheets;    Charge engineering;    Graphene wave;    Hydrogen evolution reaction;   

DOI  :  10.1007/s40820-019-0279-8

来源: DOAJ

【 摘 要 】

Abstract Charge engineering of carbon materials with many defects shows great potential in electrocatalysis, and molybdenum carbide (Mo2C) is one of the noble-metal-free electrocatalysts with the most potential. Herein, we study the Mo2C on pyridinic nitrogen-doped defective carbon sheets (MoNCs) as catalysts for the hydrogen evolution reaction. Theoretical calculations imply that the introduction of Mo2C produces a graphene wave structure, which in some senses behaves like N doping to form localized charges. Being an active electrocatalyst, MoNCs demonstrate a Tafel slope as low as 60.6 mV dec−1 and high durability of up to 10 h in acidic media. Besides charge engineering, plentiful defects and hierarchical morphology also contribute to good performance. This work underlines the importance of charge engineering to boost catalytic performance.

【 授权许可】

Unknown