Topological Defects in Metal-Free Nanocarbon for Oxygen Electrocatalysis
Topological Defects in Metal-Free Nanocarbon for Oxygen Electrocatalysis
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用于氧电催化的无金属纳米碳的拓扑缺陷
DOI：
10.1002/adma.201601406
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发表时间：
2016-08-24
影响因子：
29.4
通讯作者：
Wei, Fei
中科院分区：
文献类型：
--
作者：
Tang, Cheng;Wang, Hao-Fan;Wei, Fei
以天然糊化糯米为原料，通过碳化制备了具有丰富拓扑缺陷的双功能石墨烯催化剂，探讨了其氧电催化机理。一个无氮的配置与相邻的五边形和七边形碳环显示出最低的过电位为氧还原和进化催化。多功能的合成策略和对活性来源的新见解促进了先进的无金属碳催化剂的开发，用于广泛的电催化应用。
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.