首页|Precision tuning of highly efficient Pt-based ternary alloys on nitrogen-doped multi-wall carbon nanotubes for methanol oxidation reaction

Precision tuning of highly efficient Pt-based ternary alloys on nitrogen-doped multi-wall carbon nanotubes for methanol oxidation reaction

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The electrochemical methanol oxidation is a crucial reaction in the conversion of renewable energy.To enable the widespread adoption of direct methanol fuel cells(DMFCs),it is essential to create and engi-neer catalysts that are both highly effective and robust for conducting the methanol oxidation reaction(MOR).In this work,trimetallic PtCoRu electrocatalysts on nitrogen-doped carbon and multi-wall carbon nanotubes(PtCoRu@NC/MWCNTs)were prepared through a two-pot synthetic strategy.The acceleration of CO oxidation to CO2 and the blocking of CO reduction on adjacent Pt active sites were attributed to the crucial role played by cobalt atoms in the as-prepared electrocatalysts.The precise control of Co atoms loading was achieved through precursor stoichiometry.Various physicochemical techniques were employed to analyze the morphology,element composition,and electronic state of the catalyst.Electrochemical investigations and theoretical calculations confirmed that the Pt1Co3Ru1@NC/MWCNTs exhibit excellent electrocatalytic performance and durability for the process of MOR.The enhanced MOR activity can be attributed to the synergistic effect between the multiple elements resulting from precisely controlled Co loading content on surface of the electrocatalyst,which facilitates efficient charge transfer.This interaction between the multiple components also modifies the electronic structures of active sites,thereby promoting the conversion of intermediates and accelerating the MOR process.Thus,achieving precise control over Co loading in PtCoRu@NC/MWCNTs would enable the development of high-performance catalysts for DMFCs.

Ternary alloysElectrocatalystsMethanol oxidation reactionElectron transferTheoretical calculations

Xingqun Zheng、Zhengcheng Wang、Qian Zhou、Qingmei Wang、Wei He、Shun Lu

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College of Safety Engineering,Chongqing University of Science & Technology,Chongqing 401331,China

College of Chemistry and Chemical Engineering,Chongqing University,Chongqing 400044,China

School of Chemistry and Chemical Engineering,Guizhou University,Guizhou 550025,Guiyang,China

Department of Chemistry,University of Rhode Island,Kingston 02881,Rhode Island,United States

Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 400714,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaGrowth Project of Young Scientific and Technological Talents in General Colleges and Universities in Guizhou ProvinceScience and Technology Foundation of Guizhou ProvinceNatural Science Special Foundation of Guizhou UniversityNatural Science Special Foundation of Guizhou UniversityNatural Science Foundation of ChongqingSpecial Research Assistant Program of Chinese Academy of ScienceResearch Foundation of Chongqing University of Science and Technology

522000762216900552370057[2022]143[2022]109202017702775203301CSTB2022NSCQ-BHX0035ckrc2022026

2024

10.1016/j.jechem.2023.08.051

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.88(1)
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