The Investigating and comparing the spectroscopic impedance of the electrode modified by polypyrrole in the presence of chromium, copper and iron
محورهای موضوعی : Analytical chemistry
Nafiseh Hajiabdolah
1
,
Mohammad Yousefi
2
1 - Department of Chemical Engineering, Arvand International Branch, Islamic Azad University, Abadan, Iran
2 - Department of Chemical Engineering, Arvand International Branch, Islamic Azad University, Abadan, Iran
کلید واژه: spectroscopic impedance, polypyrrole, chromium, copper, iron.,
چکیده مقاله :
In this research, the synthesis of pyrrole polymer on graphite electrode has been investigated by cyclic voltammetry method in the potential range of -0.8 to 1.2 V in phosphoric acid, including calcium chloride as an electrolyte support, and the impedance technique has been used to determine the conductivity properties and resistance of 3 elements chromium, copper and iron are used. The Nyquist curves of each element at specific voltages and in a set of voltages have been discussed individually and comparatively, and these results have been obtained that at a certain voltage, the charge transfer resistance of the copper element has decreased compared to chromium and increased compared to iron. And the iron element has the lowest load transfer resistance value, and in checking the voltage set, we came to the conclusion that the lowest load transfer resistance of the iron element and the voltage is 0.2.
In this research, the synthesis of pyrrole polymer on graphite electrode has been investigated by cyclic voltammetry method in the potential range of -0.8 to 1.2 V in phosphoric acid, including calcium chloride as an electrolyte support, and the impedance technique has been used to determine the conductivity properties and resistance of 3 elements chromium, copper and iron are used. The Nyquist curves of each element at specific voltages and in a set of voltages have been discussed individually and comparatively, and these results have been obtained that at a certain voltage, the charge transfer resistance of the copper element has decreased compared to chromium and increased compared to iron. And the iron element has the lowest load transfer resistance value, and in checking the voltage set, we came to the conclusion that the lowest load transfer resistance of the iron element and the voltage is 0.2.
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