Perovskite-like mixed oxides La_(2-x)(Sr,Th)_xCuO_(4±λ)——A novel catalyst for phenol hydroxylation

• 作 者: 刘持标 赵震 杨向光 叶兴凯 吴越
• 机 构: Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China,Changchu
• 出 处: Science in China,Ser.A
• 发表日期: 1997年11期
• 关键词: phenol Th xCuO catalysis substitution perovskite catalyzed catechol mentioned ca

Two groups of mixed oxides La2-xThxCuO4±λ(0.0≤x≤0.4)and La2-xSrxCuO4±λ(0.0≤x≤1.0) were prepared.Their crystal structures were studied with XRD and IR spectra,etc.Meanwhile,the average valence of Cu ions and nonstoichiometric oxygen (λ) was measured through chemical analyses.Catalysis of the above-mentioned mixed oxides was investigated in phenol hydroxylation,good results were obtained for some mixed oxides,and found that the catalysis of these mixed oxides have close relation with their defect structure and composition.A radical substitution mechanism was also proposed for this catalytic reaction.