CO-free hydrogen production over Au/CeO2-Fe2O3 catalysts: Part 2. Impact of the support composition on the performance in the water-gas shift reaction

▶ The support composition affects strongly the WGS activity of Au/mixed Ce-Fe oxides. ▶ The WGS activity order was: Au/CeO2 > Au/Ce50Fe50 > Au/Ce75Fe25 > Au/Ce25Fe75 > Au/Fe2O3. ▶ Difference in gold particles size and Ce3+ defects controlled the performance in the WGSR. ▶ Higher amount of Ce3+ sites was registered by FTIR on the surface of Au/CeO2.