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The promotional effect of sodium on Pt/Al2O3 catalysts for the water–gas shift (WGS) reaction was investigated with operando FTIR during steady-state and isotopic transient experiments. The highest turnover frequency (TOF) promotion per surface Pt occurred on a 0.82wt.% Pt/Al2O3 catalyst with a 30:1molar ratio of Na:Pt. This catalyst exhibited a TOF of 0.35s−1 at 250°C and 7% CO, 11% H2O, 9% CO2,...
The promotional effect of alkali additives (Na, Li, and K) in the low-temperature (200–250°C) water–gas shift reaction was studied for Pt/Al 2 O 3 and Pt/TiO 2 catalysts. Sodium showed the highest promotion of the turnover frequency (TOF), normalized by Pt on the surface. The TOF at 250°C and 6.8% CO, 22% H 2 O, 37% H 2 , and 8.5% CO 2 was enhanced by...
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