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The reaction and poisoning mechanism of SO2 with La0.9Sr0.1CoO3 model catalysts have been investigated. The structure and the chemical states of the model catalysts have been studied by using AES, XPS and XRD techniques. The results indicated that SO2 diffused into the La0.9Sr0.1CoO3 film during poisoning. La2(SO4)3 species was formed on the surface of the film and La2(SO4)3, La2(SO3)3, La2O2SO4 and...
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