Promoted tungstated zirconia (WZ) catalysts are active and selective for isomerization of light alkanes, offering good prospects for industrial application. This account is an abbreviated summary of what these catalysts are and how they work. La-promoted Tungstated zicronia (LWZ) was prepared by a slurry impregnation method. The textural properties as well as the acidities of the La-promoted catalysts were characterized by X-ray powder diffraction (XRD), N2 adsorption, NH3 temperature-programmed desorption (NH3 TPD) and Analyse thermogravimétrique (ATG). The catalytic behavior of LWZ for n-butane isomerization was studied in the presence of hydrogen at 300°C, WHSV=0.47h-1 and nC4/H2=6. In comparison to Tungstated zicronia (WZ), the catalytic activity of the La-promoted catalyst was improved.