Abstract
Surfactant-free ultrafine and uniform Pt-Co alloy nanoparticles were encapsulated within UiO-66 with controllable size and spatial distribution by using a facile one-step strategy. The reduction of Co precursors (with a low reduction potential) under mild condition was achieved by the active Pt–H species that was produced from H2 dissociation on the first reduced Pt. The as-synthesized PtCo@UiO-66 core–shell catalysts exhibited superior synergy and catalytic activity in the hydrogenation of nitrobenzene under atmospheric pressure of H2 and room temperature. Most importantly, the confined catalysts were much more active, selective, and stable than the supported PtCo/UiO-66 material, owing to the confinement effect offered by the outer MOF shell.
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