Structures and Catalytic Activities of LaSrCoO_4 and LaSrCoO_(3.6)F_(0.4) mixed Oxides

摘要

The perovskite-like LaSrCoO_4 and LaSrCoO_(3.6)F_(0.4) mixed oxides were prepared by the polyglycol gel method, investigated by using the XRD, TEM, BET, O_2-TPD and XPS methods, and used successfully for CO and C_3H_8 oxidization. The results indicate that LaSrCoO_4 and LaSrCoO_(3.6)F_(0.4) mixed oxides have K_2NiF_4 structure. The catalytic activity of LaSrCoO_4 is better than that of LaSrCoO_(3.6)F_(0.4), this is explained in terms of more mobile lattice oxygen, higher content of Co~(3+), more oxygen vacancies, smaller particle size and larger BET surface areas of LaSrCoO_4.