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In this work, Pd nanowire (PdNW)\/CuO<jats:italic><jats:sub>x<\/jats:sub><\/jats:italic> heterogeneous catalysts with different types of Pd\uf8ffO\uf8ffCu interfaces (Pd\/amorphous or crystalline CuO<jats:italic><jats:sub>x<\/jats:sub><\/jats:italic>) are prepared via a two\u2010step hydrothermal strategy followed by an air plasma treatment. Their interface\u2010dependent performance on methanol and ethanol oxidation reaction (MOR and EOR) is clearly observed. The as\u2010prepared PdNW\/crystalline CuO<jats:italic><jats:sub>x<\/jats:sub><\/jats:italic> catalyst with 17.2 at% of Cu on the PdNW surface exhibits better MOR and EOR activity and stability, compared with that of PdNW\/amorphous CuO<jats:italic><jats:sub>x<\/jats:sub><\/jats:italic> and pristine PdNW catalysts. Significantly, both the cycling tests and the chronoamperometric measurements reveal that the PdNW\/crystalline CuO<jats:italic><jats:sub>x<\/jats:sub><\/jats:italic> catalyst yields excellent tolerance toward the possible intermediates including formaldehyde, formic acid, potassium carbonate, and carbon monoxide generated during the MOR process. The detailed analysis of their chemical state reveals that the enhanced activity and antipoison ability of the PdNW\/crystalline CuO<jats:italic><jats:sub>x<\/jats:sub><\/jats:italic> catalyst originates from the electron\u2010deficient Pd<jats:sup>\u03b4+<\/jats:sup> active sites which gradually turn into Pd<jats:sub>5<\/jats:sub>O<jats:sub>4<\/jats:sub> species during the MOR catalysis. The Pd<jats:sub>5<\/jats:sub>O<jats:sub>4<\/jats:sub> species can likely be stabilized by moderate crystalline CuO<jats:italic><jats:sub>x<\/jats:sub><\/jats:italic> decorated on the surface of PdNW due to the strong Pd\uf8ffO\uf8ffCu interaction.<\/jats:p>","DOI":"10.1002\/smll.201904964","type":"journal-article","created":{"date-parts":[[2019,12,23]],"date-time":"2019-12-23T08:07:00Z","timestamp":1577088420000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":72,"title":["Engineering the Metal\/Oxide Interface of Pd Nanowire@CuO<i><sub>x<\/sub><\/i> Electrocatalysts for Efficient Alcohol Oxidation Reaction"],"prefix":"10.1002","volume":"16","author":[{"given":"Zelin","family":"Chen","sequence":"first","affiliation":[{"name":"School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education Tianjin Key Laboratory of Composite and Functional Materials Tianjin University  Tianjin 300372 P. 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