Journal
NANO-MICRO LETTERS
Volume 11, Issue 1, Pages -Publisher
SHANGHAI JIAO TONG UNIV PRESS
DOI: 10.1007/s40820-019-0279-8
Keywords
Molybdenum carbide; Nitrogen-doped carbon nanosheets; Charge engineering; Graphene wave; Hydrogen evolution reaction
Funding
- Changsha Science and Technology Plan [kq1801065]
- Hunan Provincial Science and Technology Plan Project [2017TP1001]
- National Key RAMP
- D Program of China [2018YFB0704100]
- NSFC [11627901]
- Scientific Challenge Project of China [TZ2018001]
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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.
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