Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
52234 | Catalysis Communications | 2008 | 5 Pages |
Abstract
CuO–CeO2 nanocomposites were prepared by coprecipitation of nitrates at various pH values and used for preferential oxidation (PROX) of CO in a hydrogen rich gas. Precipitation at high pH led to a high concentration of CeO2 nucleation and abundant active Cui sites (Cu atoms at interface between CuO and CeO2) on prepared nanocomposites. The reducibility of CuiO and its turnover frequency for PROX were increased with the pH during preparation of nanocomposites. Catalysts coprecipitated at pH ⩾ 12 exhibited excellent CO conversion (>99%) and distinguished CO selectivity (88%) for PROX at a low reaction temperature of 125 °C.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Liang-Chor Chung, Chuin-Tih Yeh,