CO Oxidation on Supported Gold Catalysts

In studies on supported gold catalysts different gold precursor compounds and miscellaneous support materials, such as NiO, ° Fe203 °  

From results presented so far on low temperature CO oxidation the following main conclusions can be drawn  

The first model assumes that oxygen adsorption takes place directly on the gold nanoparticles and the role of support is to stabilize very small gold particles with highly reactive gold sites or crystallite faces (reaction pathway 1 in the 

The above results and some recent literature data related to the involvement of ionic form of gold in CO activation, encouraged the authors of this review to demonstrate that MIMNES can also be formed in supported gold catalysts. If a non-active support, such as MgO is used in this case (Au) m-(Au) n type ensemble sites can be formed provided the reduction of the gold precursor compound is controlled. 

In the literature there has been no investigation of the role of additives or 

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Janssens, T. V. Carlsson, A. Puig-Molina, A. Clausen, B. S., Relation between nanoscale Au particle structure and activity for CO oxidation on supported gold catalysts, J. Catal. 2006, 240(2), 108-113... 

Fig. 15.4 Mechanism of CO oxidation on supported gold catalysts, as proposed by Kung et al. (a) and model ensemble of Au and Au -OH sites (b) [11],...

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