Selective Oxidation of Styrene to Benzaldehyde by Co-Ag Codoped ZnO Catalyst and H₂O₂ as Oxidant

Table 2

Effect of the catalyst’s amount and loading.

Entry	Catalyst	Amount of catalyst (g)	Styrene conversion	Yield^a (% mol)
				Benzaldehyde	Acetophenone
1	Without	—	1	1	0
2	C1	0.02	5	5	0
3	C2	0.02	30	30	0
4	C3	0.02	25	25	0
5	C4	0.02	61	58	3
6	C5	0.02	75	45	33
7	C6	0.02	80	48	16
8	C4	0.005	30	30	0
9	C4	0.01	50	50	0
10	C4	0.015	53	53	0

Reaction conditions: H₂O₂/styrene, 1; temperature, 80°C; solvent, acetonitrile; reaction time, 24 h; ^ayields determined by GC using dodecane as an internal standard.