Size-dependent strong metal-support interaction in TiO2 supported Au nanocatalysts.

Abstract:

:The strong metal-support interaction (SMSI) has long been studied in heterogonous catalysis on account of its importance in stabilizing active metals and tuning catalytic performance. As a dynamic process taking place at the metal-support interface, the SMSI is closely related to the metal surface properties which are usually affected by the size of metal nanoparticles (NPs). In this work we report the discovery of a size effect on classical SMSI in Au/TiO2 catalyst where larger Au particles are more prone to be encapsulated than smaller ones. A thermodynamic equilibrium model was established to describe this phenomenon. According to this finding, the catalytic performance of Au/TiO2 catalyst with uneven size distribution can be improved by selectively encapsulating the large Au NPs in a hydrogenation reaction. This work not only brings in-depth understanding of the SMSI phenomenon and its formation mechanism, but also provides an alternative approach to refine catalyst performance.

journal_name

Nat Commun

journal_title

Nature communications

authors

Du X,Huang Y,Pan X,Han B,Su Y,Jiang Q,Li M,Tang H,Li G,Qiao B

doi

10.1038/s41467-020-19484-4

subject

Has Abstract

pub_date

2020-11-16 00:00:00

pages

5811

issue

1

issn

2041-1723

pii

10.1038/s41467-020-19484-4

journal_volume

11

pub_type

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