Boosting the catalysis of gold by O2 activation at Au-SiO2 interface.

Abstract:

:Supported gold (Au) nanocatalysts have attracted extensive interests in the past decades because of their unique catalytic properties for a number of key chemical reactions, especially in (selective) oxidations. The activation of O2 on Au nanocatalysts is crucial and remains a challenge because only small Au nanoparticles (NPs) can effectively activate O2. This severely limits their practical application because Au NPs inevitably sinter into larger ones during reaction due to their low Taman temperature. Here we construct a Au-SiO2 interface by depositing thin SiO2 layer onto Au/TiO2 and calcination at high temperatures and demonstrate that the interface can be not only highly sintering resistant but also extremely active for O2 activation. This work provides insights into the catalysis of Au nanocatalysts and paves a way for the design and development of highly active supported Au catalysts with excellent thermal stability.

journal_name

Nat Commun

journal_title

Nature communications

authors

Zhang Y,Zhang J,Zhang B,Si R,Han B,Hong F,Niu Y,Sun L,Li L,Qiao B,Sun K,Huang J,Haruta M

doi

10.1038/s41467-019-14241-8

subject

Has Abstract

pub_date

2020-01-28 00:00:00

pages

558

issue

1

issn

2041-1723

pii

10.1038/s41467-019-14241-8

journal_volume

11

pub_type

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