Water-Mediated Mars–Van Krevelen Mechanism for CO Oxidation on Ceria-Supported Single-Atom Pt1 Catalyst

In water-promoted CO oxidation, water was thought not to directly participate in CO2 production. Here we report that via a water-mediated Mars–van Krevelen (MvK) mechanism, water can directly contribute to about 50% of CO2 production on a single-atom Pt1/CeO2 catalyst. The origin is the facile react...

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Bibliographic Details
Published in:ACS catalysis 2017-01, Vol.7 (1), p.887-891
Main Authors: Wang, Chunlei, Gu, Xiang-Kui, Yan, Huan, Lin, Yue, Li, Junjie, Liu, Dandan, Li, Wei-Xue, Lu, Junling
Format: Article
Language:English
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Summary:In water-promoted CO oxidation, water was thought not to directly participate in CO2 production. Here we report that via a water-mediated Mars–van Krevelen (MvK) mechanism, water can directly contribute to about 50% of CO2 production on a single-atom Pt1/CeO2 catalyst. The origin is the facile reaction of CO with the hydroxyl from dissociated water to yield the carboxyl intermediate, which dehydrogenates subsequently with the help of a lattice hydroxyl to generate CO2 and water. The water-mediated MvK type reaction found here provides new insights in the promotion role of water in heterogeneous catalysis.
ISSN:2155-5435
2155-5435
DOI:10.1021/acscatal.6b02685