Nitrogen-doped carbon cloth as a stable self-supported cathode catalyst for air/H2-breathing alkaline fuel cells

被引:10
作者
Vivekananthan, Jeevanthi [1 ]
Masa, Justus [1 ]
Chen, Peirong [2 ]
Xie, Kunpeng [2 ]
Muhler, Martin [2 ]
Schuhmann, Wolfgang [1 ]
机构
[1] Ruhr Univ Bochum, Analyt Chem Ctr Electrochem Sci CES, D-44780 Bochum, Germany
[2] Ruhr Univ Bochum, Lab Ind Chem, D-44780 Bochum, Germany
关键词
N-doped carbon cloth; oxygen reduction reaction; air/H-2-alkaline fuel cell; long-term stability; OXYGEN REDUCTION REACTION; METAL-FREE CATALYSTS; HIGH ELECTROCATALYTIC ACTIVITY; RAMAN MICROPROBE; NANOTUBES; COMPOSITE; GRAPHENE; NANOPARTICLES; PERFORMANCE; STABILITY;
D O I
10.1016/j.electacta.2015.09.064
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The power output of a fuel cell is limited by among others, the intrinsic activity of the active matrix and the mass transport of the products and reactants. Of equally crucial importance is the long-term durability of the cell components including the electrocatalysts. Herein, carbon cloth (CC) was functionalized with nitrogen-containing groups by treatment with NH3 at 400 degrees C or by pyrolysis of a composite of polypyrrole on CC at 800 degrees C. The resulting N-doped CC (NCC) was employed as an air-breathing cathode in a custom-made air/H-2 alkaline fuel cell, serving as the current collector as well as catalytic matrix with enhanced oxygen transport. The cell exhibited high operational durability with only 2% loss in activity after 25 days and delivered a maximum power density of 120 mW m(-2) at a voltage of 0.35 V. The concept of a self-supported highly stable metal-free catalyst and the breathing H-2/air cell design provide platforms for the design and investigation of catalysts. Moreover, a higher cell voltage can be realized if the cell is operated under pressurized conditions or by replacing air with O-2. (C) 2015 Published by Elsevier Ltd.
引用
收藏
页码:312 / 319
页数:8
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