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Scanning electron microscopy (SEM) images of electrode surfaces (413 μm2). (A) An overall coating and (B) microscale surface morphology of IrOx which was activated by biasing bare Ir between +0.8 and −0.9 V at 1 Hz for 1600 s is shown. (C) An overall coating and (D) microscale surface morphology of PEDOT which was galvanostatically deposited at 6 nA for 900 s is shown.
