Sputtered cobalt-carbon-nitrogen thin films as oxygen reduction electrocatalysts - I. Physical and electrochemical characterization

被引:35
作者
Deng, CZ [1 ]
Dignam, MJ [1 ]
机构
[1] Univ Toronto, Dept Chem, Toronto, ON M5S 1A1, Canada
关键词
D O I
10.1149/1.1838835
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Thin films of amorphous Co-C-N mixtures which were co-sputtered in vacuum showed good catalyst properties for oxygen reduction in alkaline solution. The optimal catalytic activity was Co0.68C0.16N0.16. The oxygen reduction for these films proceeds via a four-electron pathway and the Co2+/Co3+ redox couple is shown to be responsible for the oxygen reduction reaction. The performance is comparable to transition metal macrocycles in alkaline solutions. Evidently, intact structures of the macrocycles are not necessary for good catalyst activity.
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页码:3507 / 3512
页数:6
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