In situ manipulation of the active Au-TiOinterface with atomic precision during CO oxidation

Wentao Yuan, Beien Zhu, Ke Fang, Xiao Yan Li, Thomas W. Hansen, Yang Ou, Hangsheng Yang, Jakob B. Wagner, Yi Gao, Yong Wang*, Ze Zhang

*Corresponding author for this work

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The interface between metal catalyst and support plays a critical role in heterogeneous catalysis. An epitaxial interface is generally considered to be rigid, and tuning its intrinsic microstructure with atomic precision during catalytic reactions is challenging. Using aberration-corrected environmental transmission electron microscopy, we studied the interface between gold (Au) and a titanium dioxide (TiO2) support. Direct atomic-scale observations showed an unexpected dependence of the atomic structure of the Au-TiOinterface with the epitaxial rotation of gold nanoparticles on a TiO2surface during carbon monoxide (CO) oxidation. Taking advantage of the reversible and controllable rotation, we achieved in situ manipulation of the active Au-TiOinterface by changing gas and temperature. This result suggests that real-time design of the catalytic interface in operating conditions may be possible.

Original languageEnglish
Article numberabe3558
Issue number6528
Number of pages4
Publication statusPublished - 2021


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