二维碳基材料具有特殊的电荷传输通道和高效传质界面,是气-液-固三相电催化系统中优异的反应界面。提出了一种新颖的、可方便有效地实现二维碳材料构建的钠离子封端策略,在此基础上通过缺陷羰基化方法将丰富的不饱和含氧基团接枝到二维碳表面。结果表明,最终的产物在H型电解池中表现出高达90%的过氧化氢电催化选择性和270 mmol/(g_catalyst·h)的实际过氧化氢生产速率。该研究不仅为二维碳基结构的设计提供了一个新的方法,而且为富含不饱和含氧基团的二维碳在要求快速反应扩散和高密度活性位的气液固三相电催化系统中的应用提供了策略。

Two-dimensional carbon-based materials have special charge transfer channels and efficient mass transfer interfaces,making them excellent reaction interfaces in gas-liquid-solid three-phase electrocatalytic system.Herein,a novel sodium ion-capping strategy is proposed,which can easily and efficiently achieve the a construction of two-dimensional carbon materials.Moreover,abundant unsaturated oxygen-containing groups are also grafted on the surface of the two-dimensional carbon materials through defect-carbonylation method.It is found by the results that the final product exhibits a 90% of hydrogen peroxide selectivity in electrocatalysis,and a practical hydrogen peroxide up to 270 mmol·g_catalyst^-1·h^-1 in a H-type cell.This work provides a new stagey for the design of two-dimensional carbon-based structure,and also sheds lights on the application of unsaturated oxygen-containing groups two-dimensional carbon materials in the gas-liquid-solid three-phase electrocatalytic system that requires high charge-transmission and fast reaction-diffusion.

花志雄(1997-),男,硕士生,研究方向为电催化氧还原,727163372@qq.com;杨仁春(1979-),男,博士,教授,研究方向为催化剂工程,通讯联系人,yrclq6@163.com。