title: Catalytic activity and structure properties of doped VOHPO4 x 0.5H2O with nanosized Ru, Au, Fe and Mn in benzene hydroxylation.
abstract: The promotional effect of nanosized Ru, Fe, Au, and Mn particles on VOHPO4 x 0.5H2O (VHP) catalytic properties was investigated in benzene hydroxylation reaction using hydrogen hydroperoxide (H2O2) as oxidant. Catalytic results indicated a profound effect of the nanoparticle dopants on VHP catalyst activity and products distribution. Amongst the promoted VHP catalysts, Au/VHP exhibited high catalytic effect with benzene conversion of 76% at a combined 85.5% selectivity toward the formation of phenol and hydroquinone achieved in 6 h under optimised reaction conditions. The extended scope application of nanosized doped Au-VHP showed to provide an effective catalyst for activation of the aromatic hydrocarbons C-H bonds into oxygenate derivatives. The catalyst could be re-used for several cycles with insignificant loss of activity. The doped nanosized Au-VHP catalyst provide a clean promising catalytic route based on heterogeneous catalysis for transformation of aromatics into value-added oxygenates.
authors.affiliation: Department of Applied Chemistry, University of Johannesburg, Doornfontein 2028, South Africa.
authors.forename: Peter R
authors.initials: PR
authors.lastname: Makgwane
authors.forename: Suprakas Sinha
authors.initials: SS
authors.lastname: Ray
mesh_terms: D001554:Benzene / Q000737:chemistry*; D006900:Hydroxylation; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry*; D010710:Phosphates / Q000737:chemistry*; D014639:Vanadium / Q000737:chemistry*
chemical_list: D010710:Phosphates; D014639:Vanadium; D001554:Benzene