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Replacing the energy\u2010demanding oxygen evolution reaction with methanol oxidation reaction (MOR) represents a promising alternative, as MOR occurs at a significantly low anodic potential, which cannot only reduce the voltage needed for electrolysis but also completely circumvents ClER. To this end, developing high\u2010performance MOR catalysts is a key. Herein, a novel quaternary Pt<jats:sub>1.8<\/jats:sub>Pd<jats:sub>0.2<\/jats:sub>CuGa\/C intermetallic nanoparticle (i\u2010NP) catalyst is reported, which shows a high mass activity (11.13 A mg<jats:sub>PGM<\/jats:sub><jats:sup>\u22121<\/jats:sup>), a large specific activity (18.13\u00a0mA cm<jats:sub>PGM<\/jats:sub><jats:sup>\u22122<\/jats:sup>), and outstanding stability toward alkaline MOR. Advanced characterization and density functional theory calculations reveal that the introduction of atomically distributed Pd in Pt<jats:sub>2<\/jats:sub>CuGa intermetallic markedly promotes the oxidation of key reaction intermediates by enriching electron concentration around Pt sites, resulting in weak adsorption of carbon\u2010containing intermediates and favorable adsorption of synergistic OH<jats:sup>\u2212<\/jats:sup> groups near Pd sites. MOR\u2010assisted seawater electrolysis is demonstrated, which continuously operates under 1.23\u00a0V for 240\u00a0h in simulated seawater and 120\u00a0h in natural seawater without notable degradation.<\/jats:p>","DOI":"10.1002\/adma.202403792","type":"journal-article","created":{"date-parts":[[2024,5,14]],"date-time":"2024-05-14T09:50:55Z","timestamp":1715680255000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":89,"title":["Pt<sub>1.8<\/sub>Pd<sub>0.2<\/sub>CuGa Intermetallic Nanocatalysts with Enhanced Methanol Oxidation Performance for Efficient Hybrid Seawater Electrolysis"],"prefix":"10.1002","volume":"36","author":[{"given":"Kaiyang","family":"Xu","sequence":"first","affiliation":[{"name":"Guangzhou Key Laboratory of Clean Transportation Energy Chemistry Guangdong Provincial Key Laboratory of Plant Resources Biorefinery School of Chemical Engineering and Light Industry Guangdong University of Technology  Guangzhou 510006 China"},{"name":"Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Rongjiang Laboratory)  Jieyang 515200 China"},{"name":"Songshan Lake Materials Laboratory (SLAB)  Dongguan 523808 P. 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