TY - JOUR
T1 - A kinetic model for the dissolution mechanism of copper in acidic sulfate solutions
AU - Wong, Danny K. Y.
AU - Coller, Bruce A. W.
AU - MacFarlane, Douglas R.
PY - 1993/10
Y1 - 1993/10
N2 - Steady-state polarization curves and impedance data have been obtained for the electrochemical dissolution copper in 1.0 M Na2SO4 solutions at pH 1, 2, 3, 4 and 5. The steady-state polarization curves display only active dissolution in the potential range investigated (from the open circuit potential up to + 100mV vs. sce) and exhibit a Tafel range of 54.8-55.6mV. Two time constants, over a wide spectrum of frequencies (10-3-10-4Hz), have been observed in all complex impedance plots. The experimental results have been quantitatively fitted by a reaction mechanism model which provides an excellent fit to the steady state data and is in qualitative agreement with the impedance data.
AB - Steady-state polarization curves and impedance data have been obtained for the electrochemical dissolution copper in 1.0 M Na2SO4 solutions at pH 1, 2, 3, 4 and 5. The steady-state polarization curves display only active dissolution in the potential range investigated (from the open circuit potential up to + 100mV vs. sce) and exhibit a Tafel range of 54.8-55.6mV. Two time constants, over a wide spectrum of frequencies (10-3-10-4Hz), have been observed in all complex impedance plots. The experimental results have been quantitatively fitted by a reaction mechanism model which provides an excellent fit to the steady state data and is in qualitative agreement with the impedance data.
KW - acidic sulfate solutions
KW - copper dissolution
KW - impedance electrochemistry
KW - kinetic and mechanism
KW - rotating copper electrode
UR - http://www.scopus.com/inward/record.url?scp=0027680888&partnerID=8YFLogxK
U2 - 10.1016/0013-4686(93)80350-9
DO - 10.1016/0013-4686(93)80350-9
M3 - Article
AN - SCOPUS:0027680888
SN - 0013-4686
VL - 38
SP - 2121
EP - 2127
JO - Electrochimica Acta
JF - Electrochimica Acta
IS - 14
ER -