Tuneable oxidation of styrene to benzaldehyde and benzoic acid over Co/ZSM-5

Tuneable synthesis of benzaldehyde and benzoic acid from solvent-free oxidation of styrene with O 2 oxidant over Co/ZSM-5 prepared at 500 and 450 °C. These two catalysts exhibited high catalytic activity with selectivity, which is 96% for benzaldehyde and 95% for benzoic acid.