Boosting electrochemical hydrogen evolution by coupling anodically oxidative dehydrogenation of benzylamine to benzonitrile  

作　　者：Kun Chen Wei Zhang Yu Bai Wanbing Gong Ning Zhang Ran Long Yujie Xiong 

机构地区：[1]a School of Chemistry and Materials Science,Frontiers Science Center for Planetary Exploration and Emerging Technologies,National Synchrotron Radiation Laboratory,and Experimental Center of Engineering and Material Sciences,University of Science and Technology of Chin,Hefei 230026,China [2]Key Laboratory of Magnetic Materials at Universities of Inner Mongolia Autonomous Region,Baotou Teachers’College,Baotou 014030,China [3]Department of Applied Physics,The Hong Kong Polytechnic University,Hong Kong 999077,China [4]Institute of Energy,Hefei Comprehensive National Science Center,Hefei 230031,China

出　　处：《Chinese Chemical Letters》2023年第3期460-464,共5页中国化学快报（英文版）

基　　金：financially supported in part by National Key R&D Program of China(No.2020YFA0406103);National Natural Science Foundation of China(NSFC,Nos.21725102,22122506,22075267,U1832156,91961106,51902311);DNL Cooperation Fund,CAS(No.DNL201922);Strategic Priority Research Program of the CAS(No.XDPB14);Anhui Provincial Natural Science Foundation(No.2008085J05);Youth Innovation Promotion Association of CAS(No.2019444);Open Funding Project of National Key Laboratory of Human Factors Engineering(No.SYFD062010K);support from USTC Center for Micro-and Nanoscale Research and Fabrication。

摘　　要：The electricity-driven water splitting acts as a promising pathway for renewable energy conversion and storage, yet anodic oxygen evolution reaction(OER) largely hinders its efficiency. Seeking the alternatives to OER exhibits the competitive advance to address this predicament. In this work, we show a more thermodynamically and kinetically favorable reaction, electrochemical oxidative dehydrogenation(EODH)of benzylamine to replace the conventional OER, catalyzed by a cobalt cyclotetraphosphate(Co_(2)P_(4)O_(12)) nanorods catalyst grown on nickel foam. This anodic reaction lowers the electricity input of 317 mV toward the desired current density of 100 mA/cm^(2), together with a highly selective benzonitrile product of more than 97%. More specifically, when coupling it with cathodic hydrogen evolution reaction(HER),the proposed HER||benzylamine-EODH configuration only requires a cell voltage of 1.47 V@100 mA/cm^(2),exhibiting an energy-saving up to 17% relative to conventional water splitting, as well as the near unit selectivity toward cathodic H_(2) and anodic benzonitrile products.

关 键 词：ELECTROSYNTHESIS Benzylamine dehydrogenation COUPLING Hydrogen evolution Cobalt cyclotetraphosphate 

分 类 号：TQ116.2[化学工程—无机化工]