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A series of partially oxidized MAX phase (i.e., Ti<jats:sub>3<\/jats:sub>AlC<jats:sub>2<\/jats:sub>, Ti<jats:sub>2<\/jats:sub>AlC, Ti<jats:sub>3<\/jats:sub>SiC<jats:sub>2<\/jats:sub>) supporting Pd catalysts were fabricated, which showed high catalytic activity; Pd\/Ti<jats:sub>3<\/jats:sub>AlC<jats:sub>2<\/jats:sub> in particular displayed high performance for conversion of furfurals into targeted ketones. Detailed studies of the catalytic mechanism confirm that in situ hydrogen spillover generates Frustrated Lewis H<jats:sup>+<\/jats:sup>\u2212H<jats:sup>\u2212<\/jats:sup> pairs, which not only act as the hydrogenation sites for selective C=O hydrogenation but also provide acid sites for ring opening. The close intimate hydrogenation and acid sites promote bifunctional catalytic reactions, substantially reducing the reported minimum reaction temperature of various furfurals by at least 30\u201360\u2009\u00b0C.<\/jats:p>","DOI":"10.1002\/anie.202211461","type":"journal-article","created":{"date-parts":[[2022,9,26]],"date-time":"2022-09-26T11:34:10Z","timestamp":1664192050000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":58,"title":["H<sup>+<\/sup>\u2212H<sup>\u2212<\/sup> Pairs in Partially Oxidized MAX Phases for Bifunctional Catalytic Conversion of Furfurals into Linear Ketones"],"prefix":"10.1002","volume":"62","author":[{"given":"Qiang","family":"Deng","sequence":"first","affiliation":[{"name":"School of Chemistry and Chemical Engineering Nanchang University  No. 999 Xuefu Avenue Nanchang 330031 PR 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