Reduction-oxidation and catalytic properties of La1 $minus; xSrxCoO3

摘要: Abstract Catalytic oxidations of carbon monoxide, propane, and methanol have been investigated over perovskite-type mixed oxides (La1 − xSrxCoO3 δ, x = 0, 0.1, 0.2, 0.4, 0.6) by the use flow pulse methods. The reduction-oxidation properties as well nonstoichiometry (δ) desorptivity oxygen were also measured. These correlated with catalytic activity emphasis on effect Sr substitution. Reducibility (or oxidizing ability) these catalysts greatly increased extent substitution (x), while reoxidation became much slower increasing x. activities when was low, but decreased at higher values. This variation explained basis a redox-like mechanism, taking account catalyst. oxidation state during steady-state monoxide varied CO O 2 ratio in accordance above explanation.