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a Rotating ring-disk electrode (RRDE) voltammograms for CANHCS-950 and Pt/C in O2-saturated 0.1 M KOH electrolyte at a rotation rate of 1600 rpm with a ring potential at 0.2 V (vs. SCE) and b number of electrons transferred and peroxide yields of CANHCS-950 and Pt/C in O2-saturated 0.1 M KOH electrolyte
