Gas-Phase Grafting GG

Gas-phase grafting (GG) is characteristic in that gold can be deposited even on the acidic surfaces, such as activated carbon and on Si02 [27]. The vapor of gold acac complex is adsorbed on the support powder probably through the interaction of electron-rich oxygen atoms in acetylacetonate and then calcined in air to decompose it into metallic gold particles. 

In contrast, gas phase grafting (GG) of dimethyl Au(III) acetylacetonate results in Au deposition both on Ti and on the Si02 surfaces, which causes p>oor selectivity to PO [24] (Table 14.2). 

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