Abstract
We exploit the role of the remnant polarization to improve the electrocatalytic performance of ferroelectric perovskite. We report cost-effective, noble metal-free, ferroelectric electrocatalyst Bi0.5Na0.5TiO3 and the effect of remnant polarization on oxygen evolution reaction involved in alkaline fuel cells. The forward poling decreases the Tafel slope from 85 mv/decade to 39 mv/decade and also increases the mass activity by threefold. The effect of polarization on flat-band potential and the Schottky barrier between electrode and electrolyte contributes to enhanced electrochemical activity.
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