Dual-atom Pt heterogeneous catalyst with excellent catalytic performances for the selective hydrogenation and epoxidation.

ABSTRACT: Atomically monodispersed heterogeneous catalysts with uniform active sites and high atom utilization efficiency are ideal heterogeneous catalytic materials. Designing such type of catalysts, however, remains a formidable challenge. Herein, using a wet-chemical method, we successfully achieved a mesoporous graphitic carbon nitride (mpg-C₃N₄) supported dual-atom Pt₂ catalyst, which exhibited excellent catalytic performance for the highly selective hydrogenation of nitrobenzene to aniline. The conversion of ˃99% is significantly superior to the corresponding values of mpg-C₃N₄-supported single Pt atoms and ultra-small Pt nanoparticles (~2 nm). First-principles calculations revealed that the excellent and unique catalytic performance of the Pt₂ species originates from the facile H₂ dissociation induced by the diatomic characteristics of Pt and the easy desorption of the aniline product. The produced Pt₂/mpg-C₃N₄ samples are versatile and can be applied in catalyzing other important reactions, such as the selective hydrogenation of benzaldehyde and the epoxidation of styrene.

SUBMITTER: Tian S 

PROVIDER: S-EPMC8155026 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature