NICOLLET, Clément; FLURA, Aurélien; VIBHU, Vaibhav; ROUGIER, Aline; BASSAT, Jean-Marc.; GRENIER, Jean-Claude

doi:10.1016/j.ijhydene.2016.04.024

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NICOLLET, Clément
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

FLURA, Aurélien
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

VIBHU, Vaibhav
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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International Journal of Hydrogen Energy. 2016, vol. 41, n° 34, p. 15538-15544

Elsevier

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The praseodymium oxide, Pr6O11, is regarded as a potential electrocatalyst for the oxygen reduction reaction. Its mixed conductivity properties are characterized. At 600 °C the oxygen diffusion coefficient value is as high as 3.4 × 10−8 cm2 s−1, and that of the surface exchange coefficient is 5.4 × 10−7 cm s−1, which supposes excellent electrocatalytic properties. The measured electronic conductivity is high enough for using this material as a SOFC cathode. Herein, praseodymium nitrate is infiltrated into Gd doped ceria (GDC) backbone and fired at 600 °C to form a composite oxygen electrode Pr6O11/GDC. Electrochemical measurements show very low polarization resistance, Rp = 0.028 Ω cm2 at 600 °C. A single cell made of a commercial Ni-YSZ/YSZ half cell and of the infiltrated cathode is able to deliver a maximum power density of 825 mW cm−2 at 600 °C. Ageing of this cell for 840 h, at 600 °C and 0.5 A cm−2, shows a degradation rate lower than 1%.< Réduire

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Solid oxide fuel cells

Composite cathodes

Praseodymium oxide

Infiltration process

Ageing SOFC test

Solid oxide fuel cells

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An innovative efficient oxygen electrode for SOFC: Pr6O11 infiltrated into Gd-doped ceria backbone

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