Abstract
Abstract The lanthanum manganite perovskites with excess Mn and La partially substituted with alkaline earth metals including Mg, Ca, Sr, and Ba were used for oxidation of trichloroethylene (TCE). Ba-substituted perovskite shows highest TCE oxidation performance. Twenty percent of excess Mn and La substitution with Ba up to 30% (La0.7Ba0.3Mn1.2O3+δ) resulted in a high Brunauer, Emmett and Teller (BET) surface area and enhanced oxygen mobility. About 12% loss of the performance of La0.7Ba0.3Mn1.2O3+δ is observed during the first 20 min, and then a steady-state conversion is established for oxidation of TCE for 10 h. The perovskite structure is not destroyed after deactivation test, and loss of surface area may be responsible for the initial performance decline.
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