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Catalysis of the hydrogen oxidation reactions by Sr-doped LaMn 1 − y Cr yO 3 ± δ oxides

Deleebeeck, L ; Birss, V

Solid State Ionics, 2011, Vol.203(1), pp.69-79 [Peer Reviewed Journal]

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  • Title:
    Catalysis of the hydrogen oxidation reactions by Sr-doped LaMn 1 − y Cr yO 3 ± δ oxides
  • Author/Creator: Deleebeeck, L ; Birss, V
  • Language: English
  • Subjects: Solid Oxide Fuel Cells ; Anode ; La 1 − X Sr Xmn 1 − Y Cr Yo 3 ± Δ ; Lscm ; Catalytic Activity ; Chemical Stability ; Temperature Programmed Reduction ; Electrochemical Impedance Spectroscopy ; Cr Content ; Sr Content ; Solid Oxide Fuel Cells ; Anode ; La 1 − X Sr Xmn 1 − Y Cr Yo 3 ± Δ
  • Is Part Of: Solid State Ionics, 2011, Vol.203(1), pp.69-79
  • Description: Sr-doped and Sr-free La 1 − x Sr xMn 1 − y Cr yO 3 ± δ (LSMC, x(Sr) = 0–0.2, y(Cr) = 0.4–0.6) perovskite-type oxides were synthesized and evaluated as single phase anodes for use in intermediate temperature solid oxide fuel cell applications. Their thermo-chemical and chemical stabilities were investigated in hydrogen at high temperatures and correlated with their oxygen non-stoichiometry (3 ± δ), determined by permanganate titration. The catalytic activity towards hydrogen oxidation was examined as a function of oxide sintering time, operating temperature, and the Sr and Cr contents, using a Pt mesh current collector. While all of the perovskite oxides studied here showed some irreversible performance degradation with time under both open circuit and anodically polarized conditions, La 0.9Sr 0.1Mn 0.6Cr 0.4O 3.03 (LSMC9164), sintered at 1200 °C for 10 h, was found to be the most catalytically active...
  • Identifier: ISSN: 0167-2738 ; E-ISSN: 1872-7689 ; DOI: 10.1016/j.ssi.2011.07.017