Selective electrochemical production of hydrogen peroxide at zigzag edges of exfoliated molybdenum telluride nanoflakes

作     者：Xuan Zhao Yu Wang Yunli Da Xinxia Wang Tingting Wang Mingquan Xu Xiaoyun He Wu Zhou Yafei Li Jonathan N.Coleman Yanguang Li Xuan Zhao;Yu Wang;Yunli Da;Xinxia Wang;Tingting Wang;Mingquan Xu;Xiaoyun He;Wu Zhou;Yafei Li;Jonathan N.Coleman;Yanguang Li

作者机构：Institute of Functional Nano and Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Soochow University College of Chemistry and Materials Science Nanjing Normal University College of Material Science and Opto-Electronic Technology University of Chinese Academy of Sciences School of Physical Sciences and CAS Key Laboratory of Vacuum Sciences University of Chinese Academy of Sciences School of Physics CRANN and AMBER Centers Trinity College Dublin 

出 版 物：《National Science Review》 (国家科学评论(英文版))

年 卷 期：2020年第7卷第8期

页      面：1360-1366页

核心收录：

学科分类：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] 

基　　金：the support of the Ministry of Science and Technology of China (2017YFA0204800) the Priority Academic Program Development of Jiangsu Higher Education Institutions the Collaborative Innovation Center of Suzhou Nano Science and Technology the support of the National Natural Science Foundation of China (21873050) the financial support from the National Natural Science Foundation of China (51622211) 

主　　题：hydrogen peroxide production non-precious-metal-based electrocatalyst molybdenum telluride liquid phase exfoliation zigzag edges 

摘      要：The two-electron reduction of molecular oxygen represents an effective strategy to enable the green, mild and on-demand synthesis of hydrogen peroxide. Its practical viability, however, hinges on the development of advanced electrocatalysts, preferably composed of non-precious elements, to selectively expedite this reaction, particularly in acidic medium. Our study here introduces 2H-MoTe;for the first time as the efficient non-precious-metal-based electrocatalyst for the electrochemical production of hydrogen peroxide in acids. We show that exfoliated 2H-MoTe;nanoflakes have high activity(onset overpotential ～140 mV and large mass activity of 27 A g;at 0.4 V versus reversible hydrogen electrode), great selectivity（H;O;percentage up to 93%） and decent stability in 0.5 M H;SO;. Theoretical simulations evidence that the high activity and selectivity of 2H-MoTe;arise from the proper binding energies of HOO;and O;at its zigzag edges that jointly favor the two-electron reduction instead of the four-electron reduction of molecular oxygen.