In situ manipulation of the active Au-Ti[0.sub.2] interface with atomic precision during CO oxidation.

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Date: Jan. 29, 2021
From: Science(Vol. 371, Issue 6528)
Publisher: American Association for the Advancement of Science
Document Type: Article
Length: 3,575 words
Lexile Measure: 1480L

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Abstract :

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 (Ti[O.sub.2]) support. Direct atomic-scale observations showed an unexpected dependence of the atomic structure of the Au-TiC 2 interface with the epitaxial rotation of gold nanoparticles on a Ti[O.sub.2] surface during carbon monoxide (CO) oxidation. Taking advantage of the reversible and controllable rotation, we achieved in situ manipulation of the active Au-Ti[O.sub.2] interface by changing gas and temperature. This result suggests that real-time design of the catalytic interface in operating conditions may be possible.

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Gale Document Number: GALE|A652681758