催化作用
尿素
聚乙烯吡咯烷酮
电化学
甲醇
无机化学
氮气
化学
碳纤维
选择性
多孔性
材料科学
化学工程
电极
有机化学
复合数
复合材料
物理化学
工程类
作者
Jian Zhang,Qidong Li,Ibrahim Saana Amiinu,Hui Wu,Chenyu Zhang,Kun Cheng,Huang Zhou,Shichun Mu
标识
DOI:10.1016/j.electacta.2015.01.172
摘要
A novel nitrogen (N)-doped carbon catalyst has been prepared using a simple but effective method by pyrolyzing polyvinylpyrrolidone (PVP) as the precursor and urea as a promoter. The physicochemical measurements results show that the sample upon adding urea not only has a porous structure with high surface area, but possesses more active N content and edge defects than the sample without adding urea. The electrochemical characterizations show that the catalyst owns a good oxygen reduction reaction (ORR) activity and a nearly 4-electron pathway selectivity in alkaline media. Notably, the onset potential of the catalyst is equal to the commercial Pt/C catalyst, and its half-wave potential is only 30 mV lower than that of Pt/C. Moreover, our catalyst exhibits impressive durability and excellent resistance to methanol crossover and CO poisoning in comparison with Pt/C catalyst.
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