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Herein, the medium\u2010entropy principle is employed to modify the structure of Pd\u2010based catalysts. An electrospinning method combined with subsequent thermal treatment is proposed to synthesize PtPdCuAg medium\u2010entropy alloy (MEA) nanoparticles dispersed on carbon nanofibers (CNFs) (PtPdCuAg MEAs\/CNFs). During the in situ electrochemical activation process, Ag migrates to the surface of PtPdCuAg MEAs, forming an Ag\u2010rich outer layer. The incorporation of various elements to create the medium\u2010entropy structure lowers the d\u2010band center of the catalyst. Moreover, the Ag skin facilitates the formation of oxygen\u2010containing intermediates, which can further oxidize toxic intermediates, thereby refreshing the catalyst surface. Additionally, the 1D CNF substrates effectively prevent the aggregation and sintering of MEA catalysts. Consequently, PtPdCuAg MEAs\/CNFs demonstrate an enhanced MOR activity of 1598.5 mA mg\n                    <jats:sup>\u22121<\/jats:sup>\n                    under alkaline conditions, which is 2.5 and 3.1 times higher than that of PtPdCu MEAs\/CNFs and commercial Pd\/C catalysts, respectively. This work not only provides a facile route to fabricate Pd\u2010based MEAs but also highlights the critical role of Ag in MOR, greatly advancing the application of ADMFCs.\n                  <\/jats:p>","DOI":"10.1002\/smll.202503445","type":"journal-article","created":{"date-parts":[[2025,4,30]],"date-time":"2025-04-30T06:13:05Z","timestamp":1745993585000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Locally Topological Disorder of Ag Sites in Medium\u2010Entropy Alloys for Methanol Electrocatalytic Oxidation"],"prefix":"10.1002","volume":"21","author":[{"given":"Qing","family":"Hu","sequence":"first","affiliation":[{"name":"Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University  Wuxi 214122 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peipei","family":"Li","sequence":"additional","affiliation":[{"name":"Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University  Wuxi 214122 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mengqian","family":"Li","sequence":"additional","affiliation":[{"name":"Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University  Wuxi 214122 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiacong","family":"Wu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University  Wuxi 214122 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenyan","family":"Fan","sequence":"additional","affiliation":[{"name":"Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University  Wuxi 214122 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haochen","family":"Zhang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University  Wuxi 214122 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xingchen","family":"Jiao","sequence":"additional","affiliation":[{"name":"Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University  Wuxi 214122 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-9294-1438","authenticated-orcid":false,"given":"Qingxia","family":"Chen","sequence":"additional","affiliation":[{"name":"Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University  Wuxi 214122 China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2025,4,30]]},"reference":[{"key":"e_1_2_7_1_1","first-page":"10","volume":"34","author":"Han G. 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