CO, H2. , 0,5%. .相似文献
XRD and TPR studies have shown that an interaction between Pd and Ag on the surface of silica after oxidation at 500 °C and reduction at 260 °C leads to the formation of solid solutions.
ToF-SIMS images of the surface of 5% Ag/SiO2 catalyst after oxidation at 500 °C and reduction at 260 °C show that Ag atoms supported on silica are not distributed homogenously but tend to form regions of enhanced Ag concentration. Positive ions images of the surface of 5% Pd/SiO2 catalyst also display regions of enhanced concentration of Pd atoms, but they are more homogenously distributed on silica.
ToF-SIMS peak intensity ratio 108Pd+/107Ag+ for bimetallic 5% Pd–5% Ag/SiO2 catalysts has a lower value than that obtained for physical mixture 5% Pd/SiO2–5% Ag/SiO2 which indicates that the surface of bimetallic catalyst is enriched with silver atoms. 相似文献
- () Pd–Pb/Al2O3. PdO–Pb/Al2O3 . PdO–PbO/Al2O3 PdO/Al2O3 PbO/Al2O3. - 823 — .相似文献
CO H2 Pd/Al2O3 Pd–Pb/Al2O3. - .相似文献