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The supported CoOx/zeolites have been prepared and applied for the epoxidation of cyclic alkenes with air. The catalysts are characterized by powder X-ray diffraction (XRD), ultraviolet–visible spectroscopy (UV–vis) and scanning electron microscope (SEM). Among these CoOx/zeolite catalysts, 2.4% CoOx/Y exhibits the best catalytic activity for the epoxidation of cis-cyclooctene with 61.2mol% conversion...
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