Kinetics of Oxygen Reduction on Cu(hkl)in Perchloric and Sulfuric Acid Solutions:RRD_(hkl)E Study

摘要

Because of its industrial importance,the electrochemistry of copper in acidic solution has been studied extensively over the years.Adsorbing anions,such as chloride,bromide or(bi)sulfate,have been shown to strongly influence copper corrosion and/or dissolution.We have recently shown that these processes are strongly sensitive to the surface state of the Cu substrate and are also determining factors for some electrochemical reactions.Of various systems examined,the oxygen reduction reaction(ORR)and hydrogen evolution/oxidation reactions HER/HOR have been of particular interest.These reactions are also fundamental constituents of other electrochemical process and/or technologies,such as the corrosion of metals in oxygenated aqueous solution or in the electroplating of metals.