The {development|improvement} of precious-metal-free catalysts to {promote|market} the sustainable production of fuels and {chemicals|chemical substances|chemical compounds} from biomass remains {an important|an essential|a crucial|a vital} and {challenging|difficult} target. {Here|Right here}, we report the {efficient|effective} hydrogenolysis of biomass-derived 5-hydroxymethylfurfural to {2|two},5-dimethylfuran {over|more than} a {unique|distinctive|special|exclusive|exceptional|one of a kind} core-shell structured catalyst Co@CoO that affords the highest productivity {among|amongst} all catalysts reported to date. Surprisingly, we {found|discovered|identified|located} that the catalytically active {sites|websites|web sites|internet sites|web-sites|web pages} reside {on the|around the} shell of CoO with oxygen vacancies {rather than|instead of|as opposed to|as an alternative to|in lieu of} the metallic Co. The {combination|mixture} of {various|numerous|different|a variety of|several|many} spectroscopic experiments and computational modelling reveals that the CoO shell incorporating oxygen vacancies drives the heterolytic and homolytic cleavage of dihydrogen to yield active Hδ- species, resulting {in the|within the|inside the} exceptional catalytic activity. Co@CoO also exhibits {excellent|superb|outstanding|exceptional|great|fantastic} activity toward the direct hydrodeoxygenation of lignin model compounds. This study unlocks, for {the first|the very first|the initial} time, the {potential|possible|prospective} of metal-oxide catalysts for the production of renewable biomass-derived fuels. 39070-14-9 supplier Formula of 109705-14-8 PMID:24563649
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