The mixed oxides, Nd2-xSrxCoO4±λ（0.4 ≤ x≤ 1.2）, with K2NiF4 structure were synthesized by the polyglycol gel method. The composition and structure of the catalysts were characterized by means of IR, TPD, TPR...The mixed oxides, Nd2-xSrxCoO4±λ（0.4 ≤ x≤ 1.2）, with K2NiF4 structure were synthesized by the polyglycol gel method. The composition and structure of the catalysts were characterized by means of IR, TPD, TPR, chemical analysis and so on. The catalytic performance for NO reduction was investigated. The results show that the mixed oxides have K2NiF4 structure. Other phases are found when x = 1.2. The amount of Co^3＋ and the lattice oxygen over Nd2-xSrxCoO4±λ increase with the increase of x. It is found that the catalytic activity for NO reduction is closely correlated with the concentration of oxygen vacancies and the amount of Co^3＋ .展开更多
文摘The mixed oxides, Nd2-xSrxCoO4±λ（0.4 ≤ x≤ 1.2）, with K2NiF4 structure were synthesized by the polyglycol gel method. The composition and structure of the catalysts were characterized by means of IR, TPD, TPR, chemical analysis and so on. The catalytic performance for NO reduction was investigated. The results show that the mixed oxides have K2NiF4 structure. Other phases are found when x = 1.2. The amount of Co^3＋ and the lattice oxygen over Nd2-xSrxCoO4±λ increase with the increase of x. It is found that the catalytic activity for NO reduction is closely correlated with the concentration of oxygen vacancies and the amount of Co^3＋ .
