Nanoporous Graphitic-C3N4@Carbon Metal-Free Electrocatalysts for Highly Efficient Oxygen Reduction

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• 作者：Yao Zheng ; Yan Jiao ; Jun Chen ; Jian Liu ; Ji Liang ; Aijun Du ; Weimin Zhang ; Zhonghua Zhu ; Sean C. Smith ; Mietek Jaroniec ; Gao Qing (Max) Lu ; Shi Zhang Qiao
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：December 21, 2011
• 年：2011
• 卷：133
• 期：50
• 页码：20116-20119
• 全文大小：775K
• 年卷期：v.133,no.50(December 21, 2011)
• ISSN：1520-5126

文摘

Based on theoretical prediction, a g-C₃N₄@carbon metal-free oxygen reduction reaction (ORR) electrocatalyst was designed and synthesized by uniform incorporation of g-C₃N₄ into a mesoporous carbon to enhance the electron transfer efficiency of g-C₃N₄. The resulting g-C₃N₄@carbon composite exhibited competitive catalytic activity (11.3 mA cm^鈥? kinetic-limiting current density at 鈭?.6 V) and superior methanol tolerance compared to a commercial Pt/C catalyst. Furthermore, it demonstrated significantly higher catalytic efficiency (nearly 100% of four-electron ORR process selectivity) than a Pt/C catalyst. The proposed synthesis route is facile and low-cost, providing a feasible method for the development of highly efficient electrocatalysts.