Greatly Enhanced Methanol Oxidation Reaction of CoPt Truncated Octahedral Nanoparticles by External Magnetic Fields

作     者：Mengyuan Zhu Yi Wang Yanfei Wu Jialong Liu Jingyan Zhang He Huang Xinqi Zheng Jianxin Shen Ruijie Zhao Wenda Zhou Shouguo Wang Mengyuan Zhu;Yi Wang;Yanfei Wu;Jialong Liu;Jingyan Zhang;He Huang;Xinqi Zheng;Jianxin Shen;Ruijie Zhao;Wenda Zhou;Shouguo Wang

作者机构：Beijing Advanced Innovation Center for Materials Genome EngineeringSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China Department of Physics and ElectronicsSchool of Mathematics and PhysicsBeijing University of Chemical TechnologyBeijing 100029China 

出 版 物：《Energy & Environmental Materials》 (能源与环境材料（英文）)

年 卷 期：2023年第6卷第5期

页      面：201-210页

核心收录：

学科分类：081704[工学-应用化学] 081705[工学-工业催化] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by the National Key Research and Development Program of China(Grant No.2019YFB2005800) the Natural Science Foundation of China(Grant Nos.52130103,52071026,51971026,and 11874082) the NSFC-ISF Joint Research Program(Grant No.51961145305) the State Key Laboratory for Advanced Metals and Materials(Grant No.2019Z-10) Beijing Natural Science Foundation Key Program(Grant No.Z190007) the Postdoctoral International Exchange Program(Grant No.YJ20210027) the Fundamental Research Funds for the Central Universities Grant(Grant No.FRF-TP-16-001C2) 

主　　题：external magnetic fields first-principle calculation methanol oxidation reaction Pt-based magnetic nanomaterials 

摘      要：Tunable behavior in electrocatalysis by external multifields,such as magnetic field,thermal field,and electric field,is the most promising strategy to expand the theory,design,and synthesis of state-of-the-art catalysts and the cell in the near ***,a systematic investigation for the effect of external magnetic field and thermal field on methanol oxidation reactions(MOR)in magnetic nanoparticles is *** Co_(42)Pt_(58)truncated octahedral nanoparticles(TONPs),the catalytic performance in MOR is greatly increased to the maximum of 14.1%by applying a magnetic field up to 3000 Oe,and it shows a monotonical increase with increasing working *** magnetic enhanced effect is closely related to the Co content of Co_(x)Pt_(100-x)***,the enhancement effect under a magnetic field is more obvious for Co_(42)Pt_(58)TONPs annealed at 650℃.First-principle calculation points out that the magnetic fields can facilitate the dehydrogenation of both methanol and water by suppression of entropy of the electron spin and lowering of the activation barrier,where OH_(ad)intermediates on Co sites play a more important *** application of magnetic fields together with thermal fields in MOR provides a new prospect to manipulate the performance of direct methanol fuel cells,which will accelerate their potential applications.