Abstract

Abstract In this work, a nanodiamond-based sp2/sp3 hybrid nanostructure composed of a nanodiamond (ND) core and sp2 surfaces was fabricated for supporting Cu single atoms as a catalyst for selective hydrogenation of phenylacetylene. Cu supported on ND after annealing at 900 °C (Cu/ND-900) showed improved activity in comparison to the catalyst of Cu supported on pristine ND (Cu/PND). Surface analyses reveal that Cu single atoms display a high dispersion and an appearance of Cu(0)/Cu(I) surface state when supported on ND-900. Our work indicates a possibility of utilizing hybrid carbon structures with tunable sp2/sp3 ratios for approaching improved-performance catalyst system.

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