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*: electrode A with catalysts before electrochemical treatment **: electrode B with catalysts treated at 200°C/0.9V ***: voltage difference between O2 and air at 300mA/cm2

*: electrode A with catalysts before electrochemical treatment **: electrode B with catalysts treated at 200°C/0.9V ***: voltage difference between O2 and air at 300mA/cm2

The terminal voltage of the cell using the degraded catalyst was lower by 12mV than that with the original one, although both catalysts had a similar Spt.

Measurements of other electrodes are currently being conducted to clarify the effect of catalyst degradation on electrode performance.

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