[Study on the spectra of Au/alpha-Fe2O3 catalysts modified by ZrO2 and Nb2O5 promoters].
A series of Au/alpha-Fe2O3 catalysts promoted with ZrO2 and Nb2O5 were prepared by parallel co-precipitation method. Detailed characterizations were conducted by techniques including UV-Vis-DRS, XPS, TEM and XRF. Results indicated that the enrichment of Au, ZrO2 and Nb2O5 on the surface induced by the strong interaction between ZrO2 and Nb2O5 kept the nanoparticles apart, delaying sintering. Performance tests carried out in the reformed methanol steam showed that its CO conversion almost reached the maximum value of 99% at 200 degrees C, and maintained a better stability compared with unmodified samples within 50 h on-stream. All these indicated that ZrO2 and Nb2O5 promoters efficiently improved the performance of the Au/alpha-Fe2O3 catalysts.
Zhang
Feng-Li
FL
National Engineering Research Center of Chemical Fertilizer Catalyst at Fuzhou University, Fuzhou 350002, China.
Zheng
Qi
Q
Lin
Xing-Yi
XY
Zhang
Han-Hui
HH
Li
Jin-Wei
JW
Zhang
Qing
Q