文献类型：期刊文献

英文题名：Trace Ru-Doped PtCuRu@PtRu Core-Shell Electrocatalyst for CO-Resilient Methanol Oxidation

作者：Xue, Tianrui[1];Xing, Shiyue[1];Liu, Zhongliang[1];Song, Yiting[1];Zhang, Jianyi[1];Liu, Miaomiao[3];Li, Huihui[1];Li, Chunzhong[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Shanghai, Peoples R China;[3]Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, Shanghai, Peoples R China

年份：2026

外文期刊名：ADVANCED SCIENCE

收录：;EI(收录号：20262020729562);WOS:【SCI-EXPANDED(收录号:WOS:001765757000001)】；

基金：This work was supported by the National Natural Science Foundation of China (U22B20143, U24A20546, 22522809, 22478121), the Shanghai Municipal Science and Technology Major Project, the Fundamental Research Funds for the Central Universities (JKA01261724).

语种：英文

外文关键词：anti-CO poisoning; bifunctional mechanism; core-shell structure; methanol oxidation reaction

摘要：To overcome the limited water dissociation capability and transition metal dissolution in Pt-based binary alloys during methanol oxidation reaction (MOR), a PtCuRu-0.05@PtRu core-shell electrocatalyst with trace Ru doping was synthesized via liquid-phase reduction followed by in-situ electrochemical dealloying. The design leverages three synergistic mechanisms: oxophilic Ru sites in the Pt-rich shell facilitate water dissociation to generate *OH for efficient *CO oxidation; lattice mismatch between the ternary PtCuRu core and trace Ru-doped Pt-rich shell induces compressive strain, downshifting the Pt d-band center to weaken *CO adsorption; and the Pt-rich shell acts as a diffusion barrier suppressing Cu dissolution. As a result, PtCuRu-0.05@PtRu delivers the highest mass activity of 1.208 A mgPt -1, surpassing PtCu@Pt and commercial Pt/C samples. Moreover, PtCuRu-0.05@PtRu exhibits superior durability, maintaining the highest current density during 3600 s chronoamperometry and showing only 3.31% activity decay after five consecutive stability tests (18,000 s), with preserved structural integrity. This work provides a viable strategy for simultaneously enhancing MOR activity and durability via synergistic composition and structure engineering.