Anion conductivity of cation exchange membranes in aqueous supporting electrolytes
نویسندگان
چکیده
Cation exchange membranes are used for electrochemical reduction of CO 2 in alkaline media, where the anion conductivity hydroxide (OH − ) and bicarbonate (HCO 3 essential process. Any partial anionic species containing (i.e. or carbonate (CO 2− ions) causes parasitic transport , a critical issue technology. In this work, cation contacted with support electrolytes is experimentally studied hydrogen pumping electrolysis cell. The total calculated from resistance measured by impedance spectroscopy, while obtained steady state I-V polarization oxidation evolution For acid form, two measurements give identical values pure water. aqueous solutions KHCO KOH concentrations up to 2.5 M HCO estimated be about 1% conductivity. • phenomenon CEMs described. A method measuring reported. Anion electrolyte ca. 1.0% total.
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ژورنال
عنوان ژورنال: Solid State Ionics
سال: 2022
ISSN: ['0167-2738', '1872-7689']
DOI: https://doi.org/10.1016/j.ssi.2022.115984