High oxygen-reduction activity and durability of nitrogen-doped graphene

作者：Geng Dongsheng^*; Chen Ying; Chen Yougui; Li Yongliang; Li Ruying; Sun Xueliang; Ye Siyu; Knights Shanna

来源：Energy & Environmental Science, 2011, 4(3): 760-764.

DOI：10.1039/c0ee00326c

Nitrogen-doped graphene as a metal-free catalyst for oxygen reduction was synthesized by heat-treatment of graphene using ammonia. It was found that the optimum temperature was 900 degrees C. The resulting catalyst had a very high oxygen reduction reaction (ORR) activity through a four-electron transfer process in oxygen-saturated 0.1 M KOH. Most importantly, the electrocatalytic activity and durability of this material are comparable or better than the commercial Pt/C (loading: 4.85 mu g(Pt) cm(-2)). XPS characterization of these catalysts was tested to identify the active N species for ORR.

• 出版日期2011-3