Topographic Changes of Polycrystalline Ag and Cu Electrodes in Acid Aqueous Solutions Resulting from a Prolonged Application of the Potential Reversal Technique

摘要: The electrochemical faceting and roughening of polycrystalline Ag Cu electrodes in aqueous 0.01 M HClO 4 + 0.5 NaClO at 25°C was investigated by applying a symmetric square wave potential reversal technique for 20 h between preset upper lower values the range 5 Hz 50 Hz, metal electrodissolution/electrodeposition cycling produces local each grain. amount soluble species found solution after increases as f is decreased. Under comparable conditions, both metals behave rather similar way, although deposits are always more compact than those resulting from application