Tailoring the coordination environment of Co-Sn active sites via zinc aluminate spinel support for highly chemoselective hydrogenation of methyl oleate

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dc.contributor.authorSooknoi, Tawan
dc.contributor.authorChanakha, Vichuda
dc.contributor.authorWattanakul, Titiporn
dc.contributor.authorAusavasukhi, Artit
dc.date.accessioned2026-08-06T10:56:40Z
dc.date.available2026-08-06T10:56:40Z
dc.date.issued2027-01-01
dc.description.abstractThe chemoselective hydrogenation of methyl oleate to oleyl alcohol was investigated over Co-Sn catalysts supported on zinc aluminate (ZnAl<inf>2</inf>O<inf>4</inf>). The ZA-M support, synthesized via a methanol-mediated solvothermal route, provided a high specific surface area (296.8 m<sup>2</sup>/g) and an optimized mesoporous structure. Sequential NaBH<inf>4</inf> and H<inf>2</inf> reduction finely tuned the coordination of active sites, enabling the optimized 2Co4SnBH/ZA-M catalyst to achieve a superior oleyl alcohol yield (33.58%) and a high selectivity (65.39%) at a conversion level of 51.36% via a direct hydrogenation pathway. Based on bulk and surface characterizations, a fraction of cobalt was found to remain in a cationic state, stabilized within a network of interfacial Co-O-Sn complexes and framework CoAl<inf>2</inf>O<inf>4</inf>. These species are proposed to function as bifunctional active centers, where the Sn<sup>n+</sup>/Sn<sup>0</sup> species and neighboring Co<sup>2+</sup> sites cooperatively enhance the chemoselectivity toward C=O reduction. Furthermore, the optimized catalyst demonstrated reasonable structural stability and reusability over four cycles, maintaining its catalytic viability despite a minor extent of metal leaching. These findings underscore the efficacy of spinel-supported ionic-metallic ensembles for the highly chemoselective and efficient hydrogenation of long-chain fatty acid methyl esters.
dc.identifier.citationBiomass and Bioenergy, 216, 2027
dc.identifier.doi10.1016/j.biombioe.2026.109749
dc.identifier.issn09619534
dc.identifier.other2-s2.0-105042620729
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/18383
dc.sourceBiomass and Bioenergy
dc.subjectChemoselective hydrogenation
dc.subjectCo-Sn bimetallic catalysts
dc.subjectInterfacial active sites
dc.subjectMethyl oleate
dc.subjectOleyl alcohol
dc.subjectZinc aluminate spinel
dc.titleTailoring the coordination environment of Co-Sn active sites via zinc aluminate spinel support for highly chemoselective hydrogenation of methyl oleate
dc.typeArticle

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