Origin of the unique activity of Pt/TiO2 catalysts for the water–gas shift reaction.
- Resource Type
- Article
- Authors
- Ammal, Salai Cheettu; Heyden, Andreas
- Source
- Journal of Catalysis. Oct2013, Vol. 306, p78-90. 13p.
- Subject
- *PLATINUM catalysts
*TITANIUM dioxide
*WATER gas shift reactions
*LOW temperatures
*METAL clusters
*CARBON monoxide
- Language
- ISSN
- 0021-9517
Highlights: [•] Low-temperature WGS reaction on TiO2(110)-supported Pt cluster follows a novel CO-promoted redox mechanism. [•] High-temperature WGS reaction on TiO2(110)-supported Pt cluster follows a classical redox mechanism. [•] Pt–TiO2 interface sites two orders of magnitude more active than Pt(111) surface sites. [•] Elementary processes occurring on the TiO2 surface, i.e., H2O dissociation and H diffusion largely control the overall rate. [•] First-principles-based microkinetic model provides deep insights into the unique activity of Pt/TiO2 catalysts. [ABSTRACT FROM AUTHOR]