Porous heterostructure of graphene/hexagonal boron nitride as an efficient electrocatalyst for hydrogen peroxide generation

作     者：Mengmeng Fan Zeming Wang Yuying Zhao Qixin Yuan Jian Cui Jithu Raj Kang Sun Ao Wang Jingjie Wu Hao Sun Bei Li Liang Wang Jianchun Jiang 

作者机构：Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesInternational Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjingChina Key Lab of Biomass Energy and MaterialJiangsu ProvinceJiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesInstitute of Chemical Industry of Forest ProductsChinese Academy of ForestryNanjingChina School of Environmental and Chemical EngineeringInstitute of Nanochemistry and NanobiologyShanghai UniversityShanghaiChina Chemicobiology and Functional Materials InstituteNanjing University of Science and TechnologyNanjingChina Department of Chemical and Environmental EngineeringUniversity of CincinnatiCincinnatiOhioUSA 

出 版 物：《Carbon Energy》 (碳能源（英文）)

年 卷 期：2023年第5卷第5期

页      面：138-151页

核心收录：

学科分类：0820[工学-石油与天然气工程] 081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：supported by the“National Natural Science Foundation of China (Nos.51902162,21901154)” the FoundationResearch Project of Jiangsu Province (BK20221338) Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,International Innovation Center for Forest Chemicals and Materials,Nanjing Forestry University,merit-based funding for Nanjing innovation and technology projects,Shanghai Pujiang Program (21PJD022) the Foundation of Jiangsu Key Lab of Biomass Energy and Material (JSBEM-S-202101). 

主　　题：efficient electrocatalyst graphene H_(2)O_(2)generation hexagonal boron nitride porous heterostructure 

摘      要：Compared with the traditional heteroatom doping,employing heterostructure is a new modulating approach for carbon-based electrocatalysts.Herein,a facile ball milling-assisted route is proposed to synthesize porous carbon materials composed of abundant graphene/hexagonal boron nitride(G/h-BN)heterostructures.Metal Ni powder and nanoscale h-BN sheets are used as a catalytic substrate/hard template and“nucleation seedfor the formation of the heterostructure,respectively.As-prepared G/h-BN heterostructures exhibit enhanced electrocatalytic activity toward H_(2)O_(2) generation with 86%-95%selectivity at the range of 0.45-0.75 V versus reversible hydrogen electrode(RHE)and a positive onset potential of 0.79 versus RHE(defined at a ring current density of 0.3 mA cm^(-2))in the alkaline solution.In a flow cell,G/h-BN heterostructured electrocatalyst has a H_(2)O_(2) production rate of up to 762 mmol g_(catalyst)^(-1) h^(-1) and Faradaic efficiency of over 75%during 12 h testing,superior to the reported carbon-based electrocatalysts.The density functional theory simulation suggests that the B atoms at the interface of the G/h-BN heterostructure are the key active sites.This research provides a new route to activate carbon catalysts toward highly active and selective O_(2)-to-H_(2)O_(2) conversion.