摘要
目前,许多用于工业生产的催化剂是金属氧化物的混合物(即复合氧化物),而稀土氧化物和许多别的氧化物可组成多类型的复合氧化物,如钙钛石、尖晶石、锆英石等,
A series of La2 xSrxNiO4 catalysts with tetragonal K2NiF4 structure was prepared from mixture of nitrates of the metal components. Across the scries, lattice parameters a and ω show negative deviation from Ve-gard's rule, and c and tetragonality ratio c/α arc positive . However,in the range of x = 0.0 -0.5, all the tetragonal lattice parameters agree with Vegard's rule. The catalytic activity of La2 xSrxNiO4 system for CO oxidation indicates that the conversion of CO increases with the increase of the substitutive content of Sr ion. The results are in good agreement with that the Ni3 concentration increases with increasing the x value.
基金
国家自然科学基金
