hi -situ reconstruction of single -atom Pt on Co304 for hydrogenation

Actual chemical states of single -atom metal on reducible supports remain a fiercely debated topic under reactive environments. Herein, we demonstrate that the single -atom Pt on Co304 surface undergoes an in -situ reconstruction to form isolated Pt-Co bimetallic sites via reducing coordination number of Pt-O in the presence of hydrogen from both simulations and in-situ X-ray photoelectron spectroscopy. The modified chemical states of Pt greatly promoted H2 activation, thus delivering a significantly high turnover frequency of 7,448 h -I (19.5 times over Pt nanoparticles on Co304) for hydrogenation of cinnamaldehyde. The satisfactory selectivity of 95.2% towards cinnamyl alcohol was ascribed to a tilted adsorption configuration of reactant on the catalyst surface via aldehyde group. We anticipate that the recognitions on in-situ reconstruction of single -atom catalysts (SACs) under the reducing conditions benefit the design of highly -performed hydrogenation catalysts.