Sulfur and Nitrogen Codoped Carbon Tubes as Bifunctional Metal-Free Electrocatalysts for Oxygen Reduction and Hydrogen Evolution in Acidic Media

被引:57
作者
Sun, Tao [1 ,2 ]
Wu, Qiang [1 ,2 ]
Jiang, Yufei [1 ,2 ]
Zhang, Zhiqi [1 ,2 ]
Du, Lingyu [1 ,2 ]
Yang, Lijun [1 ,2 ]
Wang, Xizhang [1 ,2 ]
Hu, Zheng [1 ,2 ]
机构
[1] Nanjing Univ, Key Lab Mesoscop Chem MOE, Sch Chem & Chem Engn, Jiangsu Prov Lab Nanotechnol, Nanjing 210023, Jiangsu, Peoples R China
[2] Nanjing Univ, Collaborat Innovat Ctr Chem Life Sci, Sch Chem & Chem Engn, Jiangsu Prov Lab Nanotechnol, Nanjing 210023, Jiangsu, Peoples R China
关键词
carbon tubes; codoping; electrocatalysis; hydrogen evolution reaction; oxygen reduction reaction; DOPED CARBONS; FUEL-CELLS; GRAPHENE; CATALYSTS; PERFORMANCE; NANOTUBES; BORON; ELECTRODES; NANOSHEETS; STABILITY;
D O I
10.1002/chem.201601535
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The technological combination of fuel cells with water electrolysis is an ideal approach to address the problems of growing energy needs and environmental pollution, in which exploring cheap and stable electrocatalysts is the main challenge. Sulfur and nitrogen codoped carbon tubes (SNCTs), prepared by annealing the mixture of amorphous carbonaceous tubes and cysteine, are found to be active bifunctional metal-free electrocatalysts for both oxygen reduction and hydrogen evolution in acidic medium. The optimized SNCT catalyst exhibits a record high onset potential of 851mV (vs. RHE) for oxygen reduction and concurrent a low overpotential of 76mV for hydrogen evolution, with superior stability and low cost. The SNCT electrocatalyst could have great potential in proton exchange membrane fuel cells and water splitting devices.
引用
收藏
页码:10326 / 10329
页数:4
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