Preparation of Pt/Al₂O₃ catalyst and its performance on methanol catalytic combustion at low temperature

Pt/Al₂O₃ catalysts were prepared by a one step method and the catalytic activity of these catalysts was evaluated by methanol combustion at low temperature. The effects of preparation conditions including the reductant concentration, the surfactant dosage, the surfactant concentration and the calcination temperature were investigated in detail. The results indicated that the catalytic activity was the highest under the conditions of 0.1 mol/L of reductant concentration, 8.53 g/g_cat. of surfactant dosage and 600℃ of calcination temperature. The methanol conversion on this kind of catalyst could reach to 52% at 25℃. The modified one step method can improve the catalytic activity further, which could reach up to 84% at 25℃.