Characterization and catalytic behavior of La 2 - x (Sr, Th) x CuO 4 ± λ in reaction NO+CO
作者： Zhao Zhen Yang Xiangguang Wu Yue
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摘要: Two mixed oxide systems La2-xSrxCuO4± λ (0.0⩽x⩽1. 0) and La2-xThxCuO4± (O. O⩽x⩽ 0.4) with K2NiF4 structure were prepared by varyingx values. Their crystal structures studied means of XRD IR spectra. The average valence Cu ion at B site, nonstoichiometric oxygen (λ) the chemical composition in bulk on surface catalysts measured analysis XPS. catalytic behavior reaction CO+NO was investigated under regular change site (λ). Meanwhile, adsorption activation small molecules NO mixture NO+CO over MS-TPD. mechanism these proposed; it has been found that, lower temperatures is rate determining step activity related to valent metallic its concentration, while higher vacancy concentration.
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