Influence of Sn on Stability and Selectivity of Pt-Sn@UiO-66-NH2 in Furfural Hydrogenation

Bimetallic catalysts are gaining flourishing research interest due to their tunable electronic and geometric structure over monometallic catalysts. Herein, we prepare a series of Pt-Sn nanoparticles with various Sn/Pt ratios encapsulated in an aminefunctionalized Zr metal-organic framework (Pt-SngUiO-66-NH2) by a sequential impregnation/reduction strategy. We find that PtSn0.01@UiO-66-NH2 with only 10% Sn addition significantly improves activity, selectivity, and stability toward the gas-phase furfural hydrogenation reaction compared with Pt@UiO-66-NH2. By comparing the spectroscopic and the catalytic results of Pt and PtSn0.01, nanoparticles confined in UiO-66 and UiO-66-NH2, we find that the enhanced catalytic property of PtSn0.01@UiO-66-NH2 is ascribed to the triple synergistic effect among the Pt, Sn, and -NH 2 group on the MOF.