Fig. 1: Formation of asymmetrically coordinated cubane Co4O4-ppa1 by ligand exchange and its electrochemical comparison with Co4O4-0.
From: {Co4O4} Cubanes in a conducting polymer matrix as bio-inspired molecular oxygen evolution catalysts
a Structural comparison of Co4O4-0 and Co4O4-ppa1 (red, blue, gray, and light blue represent O, Co, C, and N, respectively). b, c Non-aqueous redox and quantitative CV analysis of Co4O4-0 and Co4O4-ppa1. Voltammograms were recorded at 21 °C at a scan rate of 50 mV/s in CH3CN solutions containing 0.1 M nBu4NPF6 as the supporting electrolyte and 1 mM catalyst. All potentials are referenced to the reversible redox couple of ferrocene/ferrocenium ion (Fc/Fc+). d Cyclic voltammograms of 1 mM Co4O4-0 in 0.1 M Na2SO4 aqueous electrolyte at pH 1–12 with a scan rate of 10 mV/s. e Cyclic voltammograms of 1 mM Co4O4-ppa1 in 0.1 M Na2SO4 aqueous electrolyte at pH 1–12 with scan rate of 10 mV/s.
