Author/Authors :
Yuan، نويسنده , , Xianxia and Sha، نويسنده , , Hao-Dong and Ding، نويسنده , , Xin-Long and Kong، نويسنده , , Hai-Chuan and Lin، نويسنده , , He and Wen، نويسنده , , Wen and Huang، نويسنده , , Taizhong and Guo، نويسنده , , Zhi and Ma، نويسنده , , Zifeng and Yang، نويسنده , , Yong، نويسنده ,
Abstract :
A series of non-precious metal catalysts named as Co-PPy-TsOH/C towards oxygen reduction reaction (ORR) were synthesized by pyrolyzing carbon supported cobalt-polypyrrole at various temperatures for diverse durations. The catalytic activity of these catalysts was evaluated with electrochemical techniques of cyclic voltammetry, rotating disk electrode and rotating ring-disk electrode. Physicochemical techniques, such as XRD, TEM and XPS, were employed to characterize the structure/morphology of the catalysts in order to understand the effects of pyrolysis conditions on the ORR activity. The results showed that both pyrolysis temperature and the duration have essential effects on the structure/morphology as well as ORR activity of the Co-PPy-TsOH/C catalysts, pyrolyzing the precursor at 800 °C for 2 h is the optimal condition to synthesize the catalyst with the best ORR performance.
