摘要
The Keggin type polyoxometalates (Bu4N)4HPW11CoO39, (Bu4N)4PW11FeO39, (Bu4N)4HPW11CuO39 and (Bu4N)4PW11VO40 have been synthesized and supported on MCM-41 to be used as catalysts for the solvent-free oxidation of cyclohexane and cyclooctane with H2O2.