Catalytic and physico-chemical properties of La1?xSrxCoO3 perovskites |
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| Authors: | L A Isupova V A Sadykov V P Ivanov A A Rar S V Tsybulya M P Andrianova V N Kolomilchuk A N Petrov and O F Kononchuk |
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| Institution: | (1) Boreskov Institute of Catalysis, 630090 Novosibirsk, Russia;(2) Ural State University, 620083 Ekaterinburg, Russia |
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| Abstract: | Catalytic properties of strontium-substituted lanthanum cobaltites La1–xSrxCoO3 in the reaction of CO oxidation were compared with the data about chemical composition of the surface and bulk defect structure. It was found that (1) the initial catalytic activity correlates with the cobalt concentration on the surface; (2) surface composition differs from the bulk one; (3) the steady-state activity is proportional to the density of bulk extended defects. Under our experimental conditions no role of point defects was noted. |
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