In-situ construction of Pt-Ni NF@Ni-MOF-74 for selective hydrogenation of p-nitrostyrene by ammonia borane

Chemistry : a European Journal
Shuyan SongHongjjie Zhang

Abstract

Pt-Ni nanoframes (Pt-Ni NFs) exhibit outstanding catalytic for varied reactions owing to the large numbers of exposed surface active sites, but its stability and selectivity need to be improved. Herein, we reported an in-situ method for construction of a core@shell structured Pt-Ni NF@Ni-MOF-74 using Pt-Ni rhombic dodecahedral as self-sacrificial template, finding that the sample exhibits not only 100% conversion for the selective hydrogenation of p-nitrostyrene to p-aminostyrene conducted at room temperature, but also good selectivity (92%) and high stability (no activity loss after fifteen runs) during the reaction. This is attributed to the Ni-MOF-74 shell in situ formed in the preparation process, which can stabilize the evolved Pt-Ni NF and donate electrons to the Pt metals that facilitate the preferential adsorption of electrophilic -NO 2 group. This study provides a new vista to design highly active, selective and stable noble metal containing materials for selective hydrogenation reactions.

References

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Jun 14, 2019·ACS Applied Materials & Interfaces·Grzegorz GruzełMagdalena Parlinska-Wojtan

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