Oxygen Reduction Electrode Properties of the Ba(Ce,Gd,Ru) O3-δ Oxides at Low Temperatures

Haruhiko Toda; Kenji Yoshihara; Morihiro Saito; Jun Kuwano; Hidenobu Shiroishi

doi:10.4028/www.scientific.net/KEM.320.247

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Oxygen Reduction Electrode Properties of the Ba(Ce,Gd,Ru) O_3-δ Oxides at Low Temperatures

Abstract:

The O2-gas electrode (OGE) properties of the BaCe1-xGd0.2RuxO3-δ(BCGRx, x=0-0.45) oxides and the BaGd1-yRuyO3-δ(BGRy, y=0.5-1.0) oxides were examined with the cell of the type solid-state cell (OGE|BaCe0.8Gd0.2O3|OGE) below 300°C. Two single perovskite phases, BCGR0.15 in the BCGR series and BGR0.5 in the BGR series, exhibited OGE properties superior to those of known OGEs of Pt electrodes and La0.6Sr0.4Co0.98Ni0.02O3. Oxide-ion currents of the order of over one hundred μAcm-2 not yet reported were allowed to pass through the solid-state cell at low temperatures of ∼200°C.