Effects of the Substitution of the B-Site Ion on Oxygen Reduction Electrode Properties of the Pyrochlore Pb2Ru2O7-δ at Low Temperatures

Kenji Yoshihara; Takeshi Chuma; Morihiro Saito; Jun Kuwano; Hidenobu Shiroishi

doi:10.4028/www.scientific.net/KEM.320.235

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Effects of the Substitution of the B-Site Ion on Oxygen Reduction Electrode Properties of the Pyrochlore Pb₂Ru₂O_7-δ at Low Temperatures

Abstract:

The O2-gas electrode (OGE) properties of the pyrochlores Pb2Ru2-XMXO7-δ(M=Mn,Fe,Co,Ni) [PRMx] were examined below 300°C with the cell of the type (PRMx | Ba0.975Ce0.8Gd0.2O3 (BCG) | PRMx). The PRMn electrodes showed good OGE properties comparable to those of Pb2Ru2O6.5 and superior to those of a Pt-paste electrode and the La0.6Sr0.4Co0.98Ni0.02O3 electrode, which are well-known representative OGEs. The results indicate that the PRMn electrodes can be used for OGEs in low-temperature applications including oxygen sensors.