Comparative studies of low-temperature water-gas shift reaction over Pt/CeO2, Au/CeO2, and Au/Fe2O3 catalysts

We studied catalytic low-temperature water-gas shift (WGS) reaction over the Pt/CeO2, Au/CeO2 and Au/Fe2O3 catalysts. The activity of these catalysts was tested in the composition of 4% CO, 2.6-20% H2O and helium in the range of 120-360degreesC. It was found that CO and H2O concentrations have significant effects on the catalytic activity. The 1% Pt/CeO2 was substantially more active than other catalysts in the presence of 20% H2O. The catalytic activity of these catalysts was compared in the presence of H-2 and deactivation test was also performed. BET, XRD, SEM and TEM analyses give additional information on the morphological structure of investigated samples. (C) 2003 Elsevier Science B.V. All rights reserved.