Deactivation mechanism of a Au/CeZrO4 catalyst during a low-temperature water gas shift reaction

On-stream deactivation during a water gas shift (WGS) reaction over gold supported on a ceria-zirconia catalyst was examined. Although the fresh catalyst has very high low temperature ( 250 °C. This process reduces the metal-support interaction, which is considered to be critical in determining the high activity of the catalyst.