N-Doped Carbon-Wrapped Cobalt Nanoparticles on N-Doped Graphene Nanosheets for High-Efficiency Hydrogen Production

被引：308

作者：

Zhou, Weijia ^{[1
]}

Zhou, Jian ^{[2
,3
]}

Zhou, Yucheng ^{[1
]}

Lu, Jia ^{[1
]}

Zhou, Kai ^{[1
]}

Yang, Linjing ^{[1
]}

Tang, Zhenghua ^{[1
]}

Li, Ligui ^{[1
]}

Chen, Shaowei ^{[1
,4
]}

机构：

[1] S China Univ Technol, Guangzhou Higher Educ Mega Ctr, Sch Environm & Energy, New Energy Res Inst, Guangzhou 510006, Guangdong, Peoples R China

[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[3] Nanjing Univ, Dept Mat Sci & Engn, Nanjing 210093, Jiangsu, Peoples R China

[4] Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95064 USA

来源：

CHEMISTRY OF MATERIALS | 2015年 / 27卷 / 06期

关键词：

MOS2 ULTRATHIN NANOSHEETS; EVOLUTION REACTION; NITROGEN; NANOTUBES; CATALYSTS; ELECTROCATALYSTS; PHOSPHIDE; OXIDE;

D O I：

10.1021/acs.chemmater.5b00331

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：2026 / 2032

页数：7

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