Journal
CHEMISTRY OF MATERIALS
Volume 27, Issue 6, Pages 2026-2032Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.5b00331
Keywords
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Funding
- National Recruitment Program of Global Experts
- Natural Science Foundation of Guangdong Province [S2013040016465]
- Zhujiang New Stars of Science Technology [2014J2200061]
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Development of non-noble-metal catalysts for hydrogen evolution reaction (HER) with both excellent activity and robust stability has remained a key challenge in the past decades. Herein, for the first time, N-doped carbon-wrapped cobalt nanoparticles supported on N-doped graphene nanosheets were prepared by a facile solvothermal procedure and subsequent calcination at controlled temperatures. The electrocatalytic activity for HER was examined in 0.5 M H2SO4. Electrochemical measurements showed a small overpotential of only -49 mV with a Tafel slope of 79.3 mV/dec. Theoretical calculations based on density functional theory showed that the catalytically active sites were due to carbon atoms promoted by the entrapped cobalt nanopartides. The results may offer a new methodology for the preparation of effective catalysts for water splitting technology.
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