C and N Hybrid Coordination Derived Co鈥揅鈥揘 Complex as a Highly Efficient Electrocatalyst for Hydrogen Evolution Reaction

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• 作者：Zhong-Li Wang ; Xian-Feng Hao ; Zheng Jiang ; Xue-Ping Sun ; Dan Xu ; Jun Wang ; Hai-Xia Zhong ; Fan-Lu Meng ; Xin-Bo Zhang
• 刊名：Journal of the American Chemical Society
• 出版年：2015
• 出版时间：December 9, 2015
• 年：2015
• 卷：137
• 期：48
• 页码：15070-15073
• 全文大小：320K
• ISSN：1520-5126

文摘

Development of an efficient hydrogen evolution reaction (HER) catalyst composed of earth-abundant elements is scientifically and technologically important for the water splitting associated with the conversion and storage of renewable energy. Herein we report a new class of Co鈥揅鈥揘 complex bonded carbon (only 0.22 at% Co) for HER with a self-supported and three-dimensional porous structure that shows an unexpected catalytic activity with low overpotential (212 mV at 100 mA cm^鈥?) and long-term stability, better than that of most traditional-metal catalysts. Experimental observations in combination with density functional theory calculations reveal that C and N hybrid coordination optimizes the charge distribution and enhances the electron transfer, which synergistically promotes the proton adsorption and reduction kinetics.