Electropolymerization of Pyrrole on Oxidizable Metals: Role of Salicylate Ions in the Anodic Behavior of Copper

Spectroscopic evidences of the presence of hydrogenated species on the surface of copper during CO2 electroreduction at low cathodic potentials

“…The working electrode was a copper cylinder (purity 99.999%, 6 mm diameter) attached to a Teflon Ò holder. Prior to each experiment, the electrode was polished with alumina (9 lm), sonificated in water for 10 min, and activated (to produce a SERS active surface) by applying 15 voltammetric cycles between 0.4 and À1.0 V (vs. Ag/AgCl) at 100 mV s À1 (with a delay time of 10 s at À1.0 V) in 1.0 M KCl solution; this activation procedure is similar to that used by Cascalheira et al [13]. After electroactivation, the copper electrode was rinsed with milli-Q Ò water and, then, attached to the spectroelectrochemical cell.…”

Polyphenazine films as inhibitors of copper corrosion

“…The passivation of copper in oxalate and hydrogen carbonate solutions has already been studied [39][40][41][42][43][44][45] and a summary can be found in [38]; the passivated electrode will be referred to as Cu/oxalate or Cu/Na 2 C 2 O 4 and as Cu/hydrogen carbonate or Cu/NaHCO 3 below. The formation of the polymer films on passivated copper electrodes was carried out by electropolymerisation of the monomer using potential cycling, as described in the experimental section.…”

Corrosion protection of copper using polypyrrole electrosynthesised from a salicylate solution

“…Salicylate anions adsorb onto the electrode surface and chelate the copper cations generated from the dissolution of copper [11,32]. This has been confirmed by an in situ atomic force microscopy study [29].…”