Abstract
The selective hydrogenation of furfural (FAL) to furfuryl alcohol (FOL) in liquid phase has drawn tremendous attention, while designing and preparing efficient catalysts with satisfied selectivity remains a challenge due to the coexistence of two conjugated CO and CC groups within FAL molecule. This work has depicted a simple-yet-effective strategy to load small sized Pt (<2 nm) onto MOFs-derived CeO2 via atomic layer deposition (ALD) technique. Special aberration-corrected scanning transmission electron microscopy (AC-STEM) confirmed the dominant presence of Pt nanoclusters. Physicochemical properties of Pt/M-CeO2 were investigated by a various of characterizations, inclusive of XRD, SEM, TEM, BET, XPS, Raman, CO-DRIFTS and FAL-DRIFTS. In comparison to Pt/commercial CeO2 (Pt/C-CeO2), the Pt/M-CeO2 one displayed the superior catalytic activity, yielding 100% conversion of FAL and 98% selectivity to FOL. The high catalytic activity of Pt/M-CeO2 can be reasonably assigned to Pt clusters with clean surface, strongly interacting between Pt and M-CeO2, and rich oxygen vacancy/porous structure of the M-CeO2 support. This work highlights an effective approach towards deposition of noble metal clusters onto MOFs-derived metal oxides, offering an alternative way to reasonable design highly efficient catalyst in selective hydrogenation reactions.
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