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Abstract: An ecofriendly heterogeneous polyoxometalate (POM)-gold catalyst Au/BW₁₁/Al₂O₃ was synthesized and used for solvent-free epoxidation of cyclooctene under mild reaction conditions using molecular oxygen as an oxidant and t-butyl hydroperoxide (TBHP) as an initiator. The catalyst was characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD), induced coupled plasma optical emission spectrometry (ICP-OES), and Brunauer-Emmett-Teller (BET). The catalyst showed good conversion and high selectivity without use of solvents or environmentally harmful oxidants. Moreover, the catalyst is recyclable up to three cycles with no significant loss in selectivity towards epoxide.

This manuscript describes the synthesis of catalytic system which consisting with nano gold-polyoxometalate catalyst supported on the surface of neutral alumina. The resulting Au/BW11/Al2O3 was very effective for solvent-free epoxidation of cyclooctene under mild reaction conditions using molecular oxygen as an oxidant and TBHP as an initiator.

环境友好非均相多金属氧酸盐-金催化剂Au/BW₁₁/Al₂O₃上环辛烯分子氧绿色环氧化研究

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