Topological Defects in Metal-Free Nanocarbon for Oxygen Electrocatalysis

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• 作者：Cheng Tang ; Hao-Fan Wang ; Xiang Chen ; Bo-Quan Li ; Ting-Zheng Hou ; Bingsen Zhang ; Qiang Zhang ; Maria-Magdalena Titirici and Fei Wei
• 刊名：Advanced Materials
• 出版年：2016
• 出版时间：August 24, 2016
• 年：2016
• 卷：28
• 期：32
• 页码：6845-6851
• 全文大小：2024K
• ISSN：1521-4095

文摘

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.