Comparative study on the support properties in the total oxidation of dichloromethane over Pt catalysts

•Total conversion of dichloromethane was reached at 450°C over Al2O3 and PtAl2O3.•Formation of by-products over PtTiO2 and PtCeO2 is smaller than over PtAl2O3.•Dichloromethane oxidation is influenced by the nature and quantity of acid sites.•By-products formation is influenced by acid sites and catalyst reducibility.•Pt/Al2O3 showed good activity even after 55h of stability test.