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

Yunlai Zhang, Junying Zhang, Bingsen Zhang, Rui Si, Bing Han, Feng Hong, Yiming Niu, Li Sun, Lin Li, Botao Qiao (), Keju Sun (), Jiahui Huang () and Masatake Haruta
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Yunlai Zhang: Chinese Academy of Sciences
Junying Zhang: Chinese Academy of Sciences
Bingsen Zhang: Chinese Academy of Sciences
Rui Si: Zhangjiang Laboratory
Bing Han: University of Chinese Academy of Sciences
Feng Hong: Chinese Academy of Sciences
Yiming Niu: University of Chinese Academy of Sciences
Li Sun: University of Chinese Academy of Sciences
Lin Li: Chinese Academy of Sciences
Botao Qiao: Chinese Academy of Sciences
Keju Sun: Yanshan University
Jiahui Huang: Chinese Academy of Sciences
Masatake Haruta: Chinese Academy of Sciences

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: 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.

Date: 2020
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DOI: 10.1038/s41467-019-14241-8

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