Selective oxidation of CO in the presence of air over gold-based catalysts Au/TiO2/C (sonochemistry) and Au/TiO2/C (microwave).
Two model catalysts, Au/TiO2/C (S) (sonochemically derived) and Au/TiO2/C (M) (microwave derived), were produced by employing ultrasound irradiation and microwave irradiation, respectively. The deposition of gold colloids onto the support powders, TiO2/C, was accomplished by using a solvated metal atom impregnation (SMAI) method. The SMAI technique provides highly-dispersed gold particles on the TiO2/C support. The catalytic performance of Au based catalysts 1 wt% Au-TiO2/C (S) and 1 wt%Au-TiO2(M)/C (M) have been tested for the oxidation of CO in the temperature range of 0-300 degrees C and compared to that of 1 wt% Au-TiO2 (Degussa-P25). A boost in the conversion of CO was observed for the sonochemically-derived catalyst, Au/TiO2/C (S), at low temperature. Hence, the reactivity order found for CO oxidation is (Au/TiO2/C (S)>Au/TiO2 (P25)>Au/TiO2/C (M)).
George
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Department of Chemistry, Kanbar Laboratory for Nanomaterials at the Bar-Ilan University, Center for Advanced Materials and Nanotechnology, Bar-Ilan University, Ramat-Gan 52900, Israel.
Gedanken
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Department of Chemistry, Kanbar Laboratory for Nanomaterials at the Bar-Ilan University, Center for Advanced Materials and Nanotechnology, Bar-Ilan University, Ramat-Gan 52900, Israel. Electronic address: gedanken@mail.biu.ac.il.
Perkas
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Department of Chemistry, Kanbar Laboratory for Nanomaterials at the Bar-Ilan University, Center for Advanced Materials and Nanotechnology, Bar-Ilan University, Ramat-Gan 52900, Israel.
Zhong
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Institute of Chemical and Engineering Sciences, 1 Pesek Road, Jurong Island, Singapore 627833, Singapore.
D000388:Air; D002248:Carbon Monoxide / Q000737:chemistry* / Q000528:radiation effects*; D002384:Catalysis; D003080:Cold Temperature; D006046:Gold / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D008872:Microwaves; D010084:Oxidation-Reduction; D016062:Porosity; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014465:Ultrasonics; D014961:X-Ray Diffraction
C009495:titanium dioxide; D006046:Gold; D002248:Carbon Monoxide; D014025:Titanium