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.
Journal: TechConnect Briefs
Volume: Technical Proceedings of the 2014 Clean Technology Conference and Trade Show
Published: June 15, 2014
Pages: 348 - 351
Industry sectors: Advanced Materials & Manufacturing | Energy & Sustainability