Catalytic Activities of La 1-x Ca xFe 1-y Co yO 3 for Oxygen Reduction

Abstract

Abstract: To improve the properties of oxygen electrodes of fuel cells and metal-air batteries, La_1-xA’_xFe_1-yCo_yO₃(A’=Ca, Sr, Ba) were prepared. Oxygen electrode was prepared, in which La_1-_xA’_xFe_1-yCo_yO₃ were used as catalysts for oxygen reduction. In alkaline solution, the polarization curves
of the electrode were measured by using Hg/HgO as a reference electrode. The effect of constitutions on electrocatalytic activities and chemical stability
was studied. The specific surface area of catalysts was measured with BET method. It is found that, when x=0.4, the specific surface area is maximum
and the electrocatalytic activities are the best. It is indicated that La_0.6Ca_0.4Fe_0.6Co_0.4O₃ is a suitable catalyst for oxygen
reduction in alkaline solutions.

Key words: catalyst, electrode, specific surface area, polarization

CLC Number:

TQ426

GU Jun,SUI Sheng,LI Guang-Qiang,SUI Zhi-Tong. Catalytic Activities of La _1-x Ca _xFe_1-y Co _yO₃ for Oxygen Reduction[J]. Journal of Inorganic Materials.

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Catalytic Activities of La _1-x Ca _xFe_1-y Co _yO₃ for Oxygen Reduction

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