[Study on the spectra of Au/CeO2 catalysts modified by La2O3 additive].

For Au-ceria catalysts prepared by deposition-precipitation method, the catalytic performance of water gas shift reaction was studied with different La loadings. In the complete doping range, ceria retains with its cubic fluorite structures. XRD, HRTEM and UV-Vis-DRS, studies showed that La doping can improve the activity of Au-ceria catalyst by stabilizing ceria and modifying its morphology. In addition, the test of catalyst stability evaluation also proved, that a better stability performance of Au-ceria catalyst can be realized by appropriate La doping. The Au/CL5.0 sample with 5 at % La doping showed the best performance in WGS reaction.