Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 2, Pages 1415-1423Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b10642
Keywords
graphene/carbon composites; hierarchical porous structure; metal-free; nitrogen doped; oxygen reduction reaction
Funding
- National Natural Science Foundation of China [51374016, 21476022]
- State Key Program of National Natural Science of China [21236003]
- BUCT Fund for Disciplines Construction and Development [XK1531]
- Fundamental Research Funds for the Central Universities [JD1515, JD1415, YS1406]
- Beijing Higher Education Young Elite Teacher Project [YETP0509]
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Hierarchical nitrogen-doped porous graphene/carbon (NPGC) composites were fabricated by a simple and nontemplate method. The morphology characterizations demonstrate that reduced graphene oxide was successfully coated by the carbon derived from glucose, and a well-organized and interpenetrated hierarchical porous structure of NPGC was formed after pyrolysis at 950 degrees C. Notably, the prepared material, denoted as NPGC-950, has superlarge specific surface area (1510.83 m(2) g(-1)) and relatively high content percentage of pyridinic and graphitic nitrogen. As an efficient metal-free electrocatalyst, NPGC-950 exhibits a high onset potential (0.91 V vs RHE) and a nearly four-electron pathway for oxygen reduction reaction in alkaline solution as well as stronger methanol tolerance and better long-term durability than commercial Pt/C. In view of these excellent features, the obtained hierarchical N-doped metal-free porous carbon material is a promising catalyst for oxygen reduction reaction and could be widely applied in industry.
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