Influence of peroxometallic intermediaries present on polyoxometalates nanoparticles surface on the adipic acid synthesis

• Peroxometallic intermediaries are present on polyoxometalates nanoparticles.
• Peroxopolyoxometalates catalysed the cyclohexene oxidation by H2O2.
• Acetic acid stabilised the peroxide of hydrogen against its decomposition.

The cyclohexene oxidation by hydrogen peroxide catalysed by polyoxometalates (POM) has been shown as an adequate green route for the adipic acid synthesis. In this study, it has been demonstrated that POM's salts are effective catalysts for this reaction and how peroxopolyoxometalates intermediaries are the truly responsible species of the POM's salts catalytic activity and solubility. However, the latter can be reduced by calcining the catalyst previously. Polyoxomolybdates salts generally present a higher activity than polyoxotungstenates salts. Finally, it must be remarked the positive effect exerted by the acetic acid stabilising the peroxide of hydrogen against its decomposition.

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