Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
51765 | Catalysis Communications | 2008 | 5 Pages |
Abstract
The oxidation of CO over Cu/TiO2 catalysts containing different Cu loadings was investigated. The activities of the Cu/TiO2 catalysts were observed to be nearly constant for Cu contents between 3.7 wt% and 10.3 wt%. The characterization of the Cu/TiO2 catalysts by H2 temperature-programmed reduction (TPR) suggested the presence of different CuO species with distinct catalytic activities, that is, isolated Cu atoms, highly dispersed CuO, and bulk CuO. The concentration of reducible Cu2+ species at low temperatures (437 K) was observed to be independent of Cu content and Cu atom aggregation due to a 773 K treatment. These reduced Cu species are potentially responsible for the activities of Cu/TiO2 catalysts.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Ching-Shiun Chen, Jiann-Hwa You, Jarrn-Horng Lin, Yu-Yuan Chen,