过电位
电催化剂
塔菲尔方程
催化作用
材料科学
石墨烯
石墨氮化碳
铂金
无机化学
氢
化学工程
化学
电化学
纳米技术
物理化学
有机化学
电极
工程类
光催化
作者
Yao Zheng,Yan Jiao,Yihan Zhu,Lu Hua Li,Yu Han,Ying Chen,Aijun Du,Mietek Jaroniec,Shi‐Zhang Qiao
摘要
Electrocatalytic reduction of water to molecular hydrogen via the hydrogen evolution reaction may provide a sustainable energy supply for the future, but its commercial application is hampered by the use of precious platinum catalysts. All alternatives to platinum thus far are based on nonprecious metals, and, to our knowledge, there is no report about a catalyst for electrocatalytic hydrogen evolution beyond metals. Here we couple graphitic-carbon nitride with nitrogen-doped graphene to produce a metal-free hybrid catalyst, which shows an unexpected hydrogen evolution reaction activity with comparable overpotential and Tafel slope to some of well-developed metallic catalysts. Experimental observations in combination with density functional theory calculations reveal that its unusual electrocatalytic properties originate from an intrinsic chemical and electronic coupling that synergistically promotes the proton adsorption and reduction kinetics.
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