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Cyclic voltammograms on polycrystalline Cu from a single-point SECCM measurement. The experiment was performed with a nanopipette filled with 10 mM KHCO3 in an Ar environmental cell. The potential was swept from 0.5 to −1.05 V vs Ag/AgCl at a scan rate of 1 V s−1 for four consecutive cycles. The direction of potential sweeps is noted with dashed arrows on the first cycle.
