Effects of promotion of TiO2 with alkaline earth metals on the chemisorptive properties and water-gas shift activity of supported platinum catalysts

▶ WGS activity of Pt/TiO2 is affected by the presence of alkaline earth promoters. ▶ Activity depends on the nature and loading of the promoter. ▶ TOF of Pt/TiO2(x%CaO) goes through a maximum for catalyst loaded with 2% CaO. ▶ Optimized catalyst is very active and stable under realistic reaction conditions.