An Electrochemical Investigation of the EDTA Influence on the Cobalt-Manganese Electrodeposition in Aqueous Chloride Electrolytes

作者：Zhang, Huihui^*; Yuan, Juntao; Zhu, Ming

来源：International Journal of Electrochemical Science, 2017, 12(9): 8368-8380.

DOI：10.20964/2017.09.51

• Electrodeposition
• Interconnect
• Cobalt-manganese
• Disodium ethylenediaminetetraacetate
• Cyclic voltammetry

After subsequent proper heat treatment, a Co-Mn alloy coating is potentially a protective and conductive coating on ferritic stainless steel interconnects in solid oxide fuel cells. In this paper, we use electrochemical measurements to report the effects of EDTA (disodium ethylenediaminetetraacetate) in a chloride electrolyte on the Co-Mn electrodeposition process. The addition of EDTA to the chloride electrolyte significantly shifts the reduction reaction potential of cobalt in a more negative direction while slightly altering the discharging potential of manganese and most importantly, shortening to a great extent the discharge potential difference between Co2+ and Mn-2. Also, it is crucial to control the [Co-2]/[EDTA] ratio to form completely complexed cobalt ions and a very small amount of complexed manganese ions, and thus to promote the deposition of the Co-Mn alloy. The addition of EDTA to the chloride electrolyte is a promising way to prepare a Co-Mn alloy coating via electrodeposition.

• 出版日期2017-9
• 单位西安科技大学