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

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

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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 future.Here,a systematic investigation for the effect of external magnetic field and thermal field on methanol oxidation reactions(MOR)in magnetic nanoparticles is reported.For Co42Pt58 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 temperature.The magnetic enhanced effect is closely related to the Co content of CoxPt100-x TONPs.Furthermore,the enhancement effect under a magnetic field is more obvious for Co42Pt58 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 OHad intermediates on Co sites play a more important role.The 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.

external magnetic fieldsfirst-principle calculationmethanol oxidation reactionPt-based magnetic nanomaterials

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

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Beijing Advanced Innovation Center for Materials Genome Engineering,School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China

Department of Physics and Electronics,School of Mathematics and Physics,Beijing University of Chemical Technology,Beijing 100029,China

国家重点研发计划国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金NSFC-ISF Joint Research ProgramState Key Laboratory for Advanced Metals and Materials北京市自然科学基金重点项目Postdoctoral International Exchange Program中央高校基本科研业务费专项

2019YFB200580052130103520710265197102611874082519611453052019Z-10Z190007YJ20210027FRF-TP-16-001C2

2023

10.1002/eem2.12403

能源与环境材料(英文)

能源与环境材料(英文)

CSCD
ISSN：
年,卷(期)：2023.6(5)
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