C. Qi, H. Su, R. Guan, H. Lin, X. Sun, Y. Zheng, L. An
Yantai Univeristy, CN
gold catalysis, laser, gas mask
We have found that Au nanoparticles on Al2O3 (a popular commercially available support material) show surprisingly high activities for CO oxidation when properly prepared [6-11]. Our proprietary catalyst, Au deposited on a ferrite-modified alumina prepared by a modified deposition-precipitation method, very comfortably satisfies the EN 403 standard for application in gas masks. 0.20 g of the catalyst can completely convert 1.0 vol. % CO in the temperature range of 248 to 258 K and is stable for 500 hours at room temperature in a feed of 1.0 vol. % CO in air with a space velocity of 15900 h-1. In addition, it is stable after 2 months direct exposure to air and stable for more than 7 years when stored in a desiccator. Currently, we are improving the activity and stability of alumina-based Au catalyst and successfully applying it as CO removal in CO2 laser.