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Reactivity of surface and bulk oxygen in La1-xCaxFeO3-y system with respect to methane oxidation

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Abstract

The reactivity and mobility of the surface and lattice oxygen in a La1-xCaxFeO3-y system prepared via a ceramic route were studied by using CH4-TPR. While the middle-temperature (400-700oC) oxygen lattice mobility reaches maximum for samples with disordered anion vacancies, the high-temperature lattice oxygen flux appears to be controlled by a rapid transfer along disordered domain walls. In the high-temperature range, a high selectivity to syngas of methane oxidation by the lattice oxygen was achieved both for pure lanthanum ferrite and for samples with a microdomain structure.

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Authors and Affiliations

  1. Boreskov Institute of Catalysis, Novosibirsk, 630090, Russia

    V.A. Sadykov, L.A. Isupova, I.S. Yakovleva, G.M. Alikina & A.I. Lukashevich

  2. Institute of High Temperature, Russia

    S. Neophytides

Authors
  1. V.A. Sadykov
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  2. L.A. Isupova
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  3. I.S. Yakovleva
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  4. G.M. Alikina
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  5. A.I. Lukashevich
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  6. S. Neophytides
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Sadykov, V., Isupova, L., Yakovleva, I. et al. Reactivity of surface and bulk oxygen in La1-xCaxFeO3-y system with respect to methane oxidation. Reaction Kinetics and Catalysis Letters 81, 393–398 (2004). https://doi.org/10.1023/B:REAC.0000019448.50672.f7

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  • DOI: https://doi.org/10.1023/B:REAC.0000019448.50672.f7

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