Topological Defects in Metal-Free Nanocarbon for Oxygen Electrocatalysis

A bifunctional graphene catalyst with abundant topological defects is achieved via the carbonization of natural gelatinized sticky rice to probe the underlying oxygen electrocatalytic mechanism. A nitrogen‐free configuration with adjacent pentagon and heptagon carbon rings is revealed to exhibit the...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2016-08, Vol.28 (32), p.6845-6851
Main Authors: Tang, Cheng, Wang, Hao-Fan, Chen, Xiang, Li, Bo-Quan, Hou, Ting-Zheng, Zhang, Bingsen, Zhang, Qiang, Titirici, Maria-Magdalena, Wei, Fei
Format: Article
Language:English
Subjects:
Carbon
Defects
Electrocatalysis
Evolution
Graphene
nanocarbon catalysis
nitrogen doping
Oxygen
oxygen evolution
oxygen reduction
Strategy
topological defects
Topology
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Summary:A bifunctional graphene catalyst with abundant topological defects is achieved via the carbonization of natural gelatinized sticky rice to probe the underlying oxygen electrocatalytic mechanism. A nitrogen‐free configuration with adjacent pentagon and heptagon carbon rings is revealed to exhibit the lowest overpotential for both oxygen reduction and evolution catalysis. The versatile synthetic strategy and novel insights on the activity origin facilitate the development of advanced metal‐free carbocatalysts for a wide range of electrocatalytic applications.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.201601406