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Herein, an excellent CO\u2010tolerant catalyst (Pd\u2010WO\n                    <jats:sub>3<\/jats:sub>\n                    \/C) has been fabricated by loading Pd nanoparticles on WO\n                    <jats:sub>3<\/jats:sub>\n                    via an immersion\u2010reduction route. A remarkably high power density of 1.33\u00a0W cm\n                    <jats:sup>\u22122<\/jats:sup>\n                    at 80 \u00b0C is obtained by using the optimized 3Pd\u2010WO\n                    <jats:sub>3<\/jats:sub>\n                    \/C as the anode catalyst of PEMFCs, and the moderately reduced power density (73% remained) in CO\/H\n                    <jats:sub>2<\/jats:sub>\n                    mixed gas can quickly recover after removal of CO\u2010contamination from hydrogen fuel, which is not possible by using Pt\/C or Pd\/C as anode catalyst. The prominent HOR activity of 3Pd\u2010WO\n                    <jats:sub>3<\/jats:sub>\n                    \/C is attributed to the optimized interfacial electron interaction, in which the activated H* adsorbed on Pd species can be effectively transferred to WO\n                    <jats:sub>3<\/jats:sub>\n                    species through hydrogen spillover effect and then oxidized through the H species insert\/output effect during the formation of H\n                    <jats:italic>\n                      <jats:sub>x<\/jats:sub>\n                    <\/jats:italic>\n                    WO\n                    <jats:sub>3<\/jats:sub>\n                    in acid electrolyte. More importantly, a novel synergetic catalytic mechanism about excellent CO tolerance is proposed, in which Pd and WO\n                    <jats:sub>3<\/jats:sub>\n                    respectively absorbs\/activates CO and H\n                    <jats:sub>2<\/jats:sub>\n                    O, thus achieving the CO electrooxidation and re\u2010exposure of Pd active sites for CO\u2010tolerant HOR.\n                  <\/jats:p>","DOI":"10.1002\/smll.202303061","type":"journal-article","created":{"date-parts":[[2023,6,21]],"date-time":"2023-06-21T04:04:58Z","timestamp":1687320298000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":33,"title":["WO\n                    <sub>3<\/sub>\n                    \u2010Assisted Synergetic Effect Catalyzes Efficient and CO\u2010Tolerant Hydrogen Oxidation for PEMFCs"],"prefix":"10.1002","volume":"19","author":[{"given":"Han","family":"Tian","sequence":"first","affiliation":[{"name":"State Key Lab of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xu","family":"Yu","sequence":"additional","affiliation":[{"name":"State Key Lab of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China"},{"name":"Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weimin","family":"Huang","sequence":"additional","affiliation":[{"name":"State Key Lab of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ziwei","family":"Chang","sequence":"additional","affiliation":[{"name":"State Key Lab of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China"},{"name":"School of Physical Science and Technology Shanghai Tech University Shanghai 201210 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fenglai","family":"Pei","sequence":"additional","affiliation":[{"name":"Shanghai Motor Vehicle Inspection Certification &amp; Tech Innovation Center Co., Ltd. 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