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Rh single atoms on TiO2 dynamically respond to reaction conditions by adapting their site
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Rh single atoms on TiO2 dynamically respond to reaction conditions by adapting their site
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Journal Article
Rh single atoms on TiO2 dynamically respond to reaction conditions by adapting their site
2019
Overview
Single-atom catalysts are widely investigated heterogeneous catalysts; however, the identification of the local environment of single atoms under experimental conditions, as well as operando characterization of their structural changes during catalytic reactions are still challenging. Here, the preferred local coordination of Rh single atoms is investigated on TiO
2
during calcination in O
2
, reduction in H
2
, CO adsorption, and reverse water gas shift (RWGS) reaction conditions. Theoretical and experimental studies clearly demonstrate that Rh single atoms adapt their local coordination and reactivity in response to various redox conditions. Single-atom catalysts hence do not have static local coordinations, but can switch from inactive to active structure under reaction conditions, hence explaining some conflicting literature accounts. The combination of approaches also elucidates the structure of the catalytic active site during reverse water gas shift. This insight on the real nature of the active site is key for the design of high-performance catalysts.
Single-atom catalysts are widely investigated heterogeneous catalysts; however, the identification of the local environment of single atoms under experimental conditions is still challenging. Here, the authors clearly demonstrate that Rh single atoms adapt their local coordination and reactivity in response to various redox conditions.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
