Effect of Temperature on Oxide Formation in Ligand-Deficient Cu|Cu(II), Ethylenediamine System |
| |
Authors: | A Surviliené A Survila |
| |
Institution: | (1) Department of Metal Electrochemistry, Institute of Chemistry, Gostauto 9, 2600 Vilnius, Lithuania |
| |
Abstract: | The influence of temperature on formation of oxide layers on copper electrode in solutions containing 0.01 M Cu(II), 0.005 M ethylenediamine, and 0.3 M K2SO4 as a supporting electrolyte at pH 5.3 is investigated. The rate of net process Cu + Cu2+ + H2O Cu2O + 2H+ proceeding under open-circuit conditions is supposedly controlled by interaction between copper electrode and Cu2+ aqua-ions. Well-defined voltammetric peak is observed at –0.75 V (SHE), the height of which may serve as a measure of Cu2O formation rate. An activation energy and a formal rate constant of the process are found to equal 30 kJ mol–1 and 0.17 s–1. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|