Enhanced Hydrogenation Performance Over CeO ₂ Quantum Dots Modified Pt/SiC Catalyst Ignited by Hydrogen Spillover Effect

ABSTRACT Achieving high selectivity at near‐complete conversion remains a central challenge in the selective hydrogenation of multifunctional molecules. Herein, we report a near in situ activation strategy for CeO 2 quantum dots (QDs)‐modified Pt/SiC catalyst that exploits hydrogen spillover to generate Ce 3+ /SiC interfacial active sites without compromising the catalyst's intrinsic architecture. The activated catalyst achieves 93% selectivity to cinnamyl alcohol (COL) at 99% cinnamaldehyde (CAL) conversion, with a turnover frequency (TOF) approximately 2.4 times that of the untreated sample. Notably, the strategy also works for nitrobenzene and benzonitrile hydrogenations, showing broad applicability. This work provides a valuable reference for the design and activation of hydrogenation catalysts.