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Electrochemical measurements of both CDHs on thiol-modified gold electrodes at pH 6.0 (A) and pH 7.5 (B). Midpoint potentials of both CDHs were calculated from cyclic voltammograms (left) and square-wave voltammograms (middle) in the absence of a substrate. The cyclic voltammetry (right) in the presence of the substrate was used to measure the current of direct electron transfer to a gold electrode.
