Abstract
Ethyl- and n- propylbenzene peroxidation has been studied in the presence of supported gold nanoparticles on TiO2(AuNP@TiO2). The decomposition products obtained from Fenton-induced cumene hydroperoxide decomposition, as well as the oxidation products of ethyl- and n- propylbenzene, implicate the participation of reactive oxygen species adsorbed on the AuNP surface. This surface intermediate is believed to be a fundamental participant in hydrogen abstraction reactions required to facilitate the formation of the observed carbonyl derived product.
Highlights
The catalytic role of gold nanoparticles (AuNP) in the formation of radical species via Fenton decomposition of hydrogen peroxide by an electron transfer pathway has been thoroughly discussed.[1]
Ongoing efforts have been focused on elucidating the specific role of AuNP catalysts in peroxidation reactions, as well as on the identification of radical species interacting with the AuNP surface
The results obtained from the peroxidation of n-propylbenzene and ethylbenzene in the presence of CHP and AuNP@TiO2 illustrate a complete decomposition of the CHP initiator after 2 and 0.5 h, respectively
Summary
The catalytic role of gold nanoparticles (AuNP) in the formation of radical species via Fenton decomposition of hydrogen peroxide by an electron transfer pathway has been thoroughly discussed.[1]. Ongoing efforts have been focused on elucidating the specific role of AuNP catalysts in peroxidation reactions, as well as on the identification of radical species interacting with the AuNP surface. In 2007, Garcia and co-workers[5] suggested the formation and interaction of carbon centered radicals with the surface of supported AuNP during the study of alkene epoxidation. Bar-Ziv et al.[6] estimated a rate constant of 3.5 × 108 (mol L-1)-1 s−1 for the interaction between alkyl peroxyl radicals and metallic AuNP
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