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稀土镍系复合氧化物La_2-xSr_xNiO₄体系结构测定及性能考察

STRUCTURE AND PROPERTY OF RARE EARTH NICKELATE OXIDES La₂-_xSr_xNi0₄ SYSTEM

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【Author】 Zheng Hong-yuan, Du Shao-bin, Ma Fu-tai, Wang Jin(Depurtment of Chemistry, Hangzhou University, Hangzhou 310028)and Lu Guang-lie(Cebtrak Luborato(?)y, Hangzhou Uni(?)ersity, Hangzhou 310028)

【机构】杭州大学化学系；杭州大学中心试验室杭州 310028；杭州 310028；杭州 310028；

【摘要】 <正> 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,更多还原

【Abstract】 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.更多还原