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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 O 2  on Au nanocatalysts is crucial and remains a challenge because only small Au nanoparticles (NPs) can effectively activate O 2 . 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-SiO 2  interface by depositing thin SiO 2  layer onto Au/TiO 2  and calcination at high temperatures and demonstrate that the interface can be not only highly sintering resistant but also extremely active for O 2  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.

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