Abstract
A thin atomic layer deposition (ALD) TiO2 coating successfully stabilizes cobalt particles supported on TiO2 for aqueous-phase hydrogenation (APH) reactions by preventing leaching and sintering of cobalt. The uncoated conventional cobalt catalysts leach under the same conditions. Using Al2O3 coating of Co/γ-Al2O3 causes the formation of an irreducible cobalt aluminate phase which has no catalytic activity. The ALD TiO2 decorated cobalt catalyst is active for APH of a range of feedstocks including furfuryl alcohol, furfural, and xylose whereas classic non-ALD cobalt catalysts have very low activity for these reactions.
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