Abstract
The electrochemical reduction of iron (III) ions into zero-valent iron from a solution of ethylene glycol was accomplished. The kinetics and mechanism of the electroreduction process were investigated by cyclic and linear polarization techniques. The influence of temperature, potential sweep rate, and concentration of iron (III) ions on the electroreduction process was also studied. The observed values of effective activation energy revealed that the investigated electroreduction process is accompanied by mixed kinetics control. Moreover, the results of SEM and X-ray diffraction analysis confirmed the deposition of thin Fe films under the optimized conditions.
Highlights
Due to the decrease in natural energy sources, the use of environmentally friendly solar energy is very important.[1,2,3,4]Iron disulfide (FeS2) due to its non-toxicity and wide distribution on earth, it has the probability of becoming an inexpensive alternative material for fabricating highly efficient solar cells.[5,6,7,8,9,10] Depending on its optical properties, it can be used in solar cells as a photoactive absorbing layer or as a frontal transparent layer in heterostructured cells.[11]
To study the kinetics of the electroreduction of iron (III) ions, polarization curves of a linear nature were recorded depending on the temperature at a temperature range of 288–348 K
The values of Аeff showed that the electroreduction of iron ions (III) from non-aqueous electrolytes is accompanied by mixed kinetics
Summary
Iron disulfide (FeS2) due to its non-toxicity and wide distribution on earth, it has the probability of becoming an inexpensive alternative material for fabricating highly efficient solar cells.[5,6,7,8,9,10] Depending on its optical properties, it can be used in solar cells as a photoactive absorbing layer or as a frontal transparent layer in heterostructured cells.[11] The preparation of these films has been carried out by various methods. The electrochemical deposition method has been used in this work, due to its simplicity to be optimized, and non-cost. For the co-electrodeposition of two or more components simultaneously, firstly the electrochemical reduction of each component should be studied individually. This work aims to study the electrochemical reduction of iron ions, the kinetics, and the mechanism of the process in a non-aqueous solution of ethylene glycol
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