摘要
以SnO_2为载体的稀土氧化物催化剂对苯和CO完全氧化的催化活性顺序与稀土氧化物本身一样,仍呈双峰形。但其催化活性高于Al_2O_3为载体的相应的稀土氧化物催化剂,这与表面酸碱性有关。Pt/SnO_2掺入适量的稀土氧化物以后,催化氧化活性有明显提高。
The catalytic activity order of rare-earth oxides (LnOx) supported on SnO2 for benzene and CO complete oxidation presents a specific double-peak in shape, which is similar to that of rare-earth oxides. The catalytic activities of LnOx/ SnO2 ca-talysts are higher than those of corresponding rare-earth oxides supported on Al2O3. This is considered to be related to the surface acidity of the solid catalysts, LnOx/SnO2, Hammett function H0<4.0,and LnOx/Al2O3, H0>7.6. The activity for benzene and CO oxidation of Pl/SnO2 catalyst doped with CcO2 or Sm2O3 is higher than that of Pt/SnO2.
