Manageable N-doped graphene for high performance oxygen reduction reaction

Yuewei Zhang, Jun Ge, Lu Wang, Donghong Wang, Feng Ding, Xiaoming Tao, Wei Chen

Research output: Journal article publicationJournal articleAcademic researchpeer-review

176 Citations (Scopus)

Abstract

Catalysts for oxygen reduction reaction (ORR) are at the heart of key green-energy fuel cell technology. N-doped graphene is a potential metal-free electrode with much better electrocatalytic activity, long-term stability, and tolerance to crossover effect than expensive platinum-based electrocatalysts. Here, we report a feasible direct-synthesis method in preparing N-graphene with manageable N contents in a large scale. The resultant N-graphene used as electrocatalysts exhibits similar catalytic activity but superior stability compared to commercial Pt/C for ORR in an alkaline solution. It was found that their electrocatalytic activities were demonstrated to depend largely on N-doping content. When nitrogen content reaches a high value at about 24-25%, ORR reaction exhibits a favorable formation of water via a four-electron pathway. Furthermore, the effect of pyrolysis temperature and precursor on the activity of N-graphene is systematically analyzed, and may shed some light on the principle of choosing appropriate way for preparing N-graphene.
Original languageEnglish
Article number2771
JournalScientific Reports
Volume3
DOIs
Publication statusPublished - 14 Oct 2013

ASJC Scopus subject areas

  • General

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