Open AccessElectrochemical behaviour of copper in N,N-dimethylformamide + 0.5 M potassium perchlorate solution
Author(s) -
V. Vojinović,
V. Komnenić,
Miljan G. Pješčić,
Slavko Mentus
Publication year - 2000
Publication title -
journal of the serbian chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.227
H-Index - 45
eISSN - 1820-7421
pISSN - 0352-5139
DOI - 10.2298/jsc0009671v
Subject(s) - copper , tafel equation , electrochemistry , chemistry , inorganic chemistry , electrolyte , exchange current density , perchlorate , aqueous solution , polarization (electrochemistry) , dissolution , dimethylformamide , platinum , anode , metal , cathodic protection , electrode , potassium perchlorate , ion , organic chemistry , solvent , catalysis
The electrochemical deposition and dissolution of copper in 0.0025 M CuSO4 + N,N-dimethylformamide + 0.5 M KClO4 solution was examined by the rotating disc and potentiodynamic methods. Both platinum and copper were used as working electrodes. A wide polarization range -1 to +2 V vs. SCE, and several temperatures between 25 and 55?C were encompased. The Cu/electrolyte interface was found to be permanently out of equilibrium, as a consequence of the development of a passivating layer. In accordance with the classic theory of a copper electrode in acidified aqueous solutions, the cathodic and anodic Tafel lines of metallic copper define a unique value of the exchange current density, however, their slopes do not correspond to the classic theory.