Parametric Studies of Titania-Supported Gold-Catalyzed Oxidation of Carbon Monoxide
AbstractThis paper remarks the general correlations of the shape and crystallinity of titanium dioxide (TiO2) support on gold deposition and carbon monoxide (CO) oxidation. It was found that due to the larger rutile TiO2 particles and thus the pore volume, the deposited gold particles tended to agglomerate, resulting in smaller catalyst surface area and limited gold loading, whilst anatase TiO2 enabled better gold deposition. Those properties directly related to gold particle size and thus the number of low coordinated atoms play dominant roles in enhancing CO oxidation activity. Gold deposited on anatase spheroidal TiO2 at photo-deposition wavelength of 410 nm for 5 min resulted in the highest CO oxidation activity of 0.0617 mmol CO/s.gAu (89.5% conversion) due to the comparatively highest catalyst surface area (114.4 m2/g), smallest gold particle size (2.8 nm), highest gold loading (7.2%), and highest Au0 content (68 mg/g catalyst). CO oxidation activity was also found to be directly proportional to the Au0 content. Based on diffuse reflectance infrared Fourier transform spectroscopy, we postulate that anatase TiO2-supported Au undergoes rapid direct oxidation whilst CO oxidation on rutile TiO2-supported Au could be inhibited by co-adsorption of oxygen. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Chong, S.; Yang, T.-K. Parametric Studies of Titania-Supported Gold-Catalyzed Oxidation of Carbon Monoxide. Materials 2017, 10, 756.
Chong S, Yang T-K. Parametric Studies of Titania-Supported Gold-Catalyzed Oxidation of Carbon Monoxide. Materials. 2017; 10(7):756.Chicago/Turabian Style
Chong, Siewhui; Yang, Thomas Chung-Kuang. 2017. "Parametric Studies of Titania-Supported Gold-Catalyzed Oxidation of Carbon Monoxide." Materials 10, no. 7: 756.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.