催化作用
热解
生物量(生态学)
氧还原反应
还原(数学)
氧气
化学
化学工程
有机化学
数学
生物
生态学
电化学
工程类
几何学
物理化学
电极
作者
Weimin Cao,Bingjia Wang,Yinpan Xia,Wei Zhou,Jia Zhang,Ran Wen,Yi Jia,Qiang Liu
出处
期刊:International Journal of Electrochemical Science
[ESG]
日期:2019-01-01
卷期号:14 (1): 250-261
被引量:20
摘要
In this work, we developed a cost-effective, facile approach to obtain nitrogen self-doped porous biomass-derived carbon catalyst by direct co-pyrolysis of corn straw biomass with KOH. Through characterization, the obtained catalyst possesses a quite high BET surface area up to 1461.36 m2 g-1 and significant pyrrolic-N content. Electrochemical test demonstrated that nitrogen self-doped porous carbon exhibits an excellent electrocatalytic activity for oxygen reduction reaction (ORR) in alkaline media, with onset potential of -0.06 V (vs Hg/HgO) and current density of -3.42 mA cm-2, which is comparable to 20% Pt/C catalyst. More importantly, obtained catalyst shows high stability and durability towards ORR reaction. Our results demonstrated that the co-pyrolysis process is a promising route for economical and sustainable utilization of biomass towards the effective metal-free ORR catalysts for alkaline fuel cell.
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