Journal
MATERIALS RESEARCH BULLETIN
Volume 134, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2020.111094
Keywords
Metal-free catalyst; Vertical graphene; Nitrogen doping; Hydrogen evolution reaction
Categories
Funding
- National Natural Science Foundation of China [51772272]
- Natural Science Funds for Distinguished Young Scholar of Zhejiang Province [LR20E020001]
- Foundation of State Key Laboratory of Coal Conversion [J20-21-909]
- China Postdoctoral Science Foundation [2020M671713]
- Zhejiang University
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The study introduces a strategy to synthesize nitrogen doped vertical graphene (N-VG) array for catalyzing hydrogen evolution reaction (HER) in acidic electrolyte, demonstrating enhanced HER performance due to the introduction of N heteroatom leading to increased surface area and optimized electronic structure. Additionally, two possible enhancement mechanisms of N-VG are revealed with first-principle calculations, confirming the effectiveness of N doping in improving HER performance.
Building up efficient water electrolysis system relays on the development of highly active, cost-effective, and stable electrocatalysts. Carbon-based metal-free catalysts are one of the promising candidates for this purpose. Herein, we report a facile strategy to synthesize nitrogen doped vertical graphene (N-VG) array for catalyzing hydrogen evolution reaction (HER) in acidic electrolyte. The resultant N-VG metal-free catalyst exhibits enhanced HER performance with an overpotential of 290 mV at 10 mA cm(-2) and good cycling stability. The enhanced performance is due to the enlarged surface area and optimization of electronic structure induced by the introduction of N heteroatom. Moreover, two possible enhancement mechanisms of N-VG are revealed with first-principle calculations. Our work further demonstrates the effectiveness of N doping on enhancement of HER.
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