Electrical Conductivity of Lithium, Sodium, Potassium, and Quaternary Ammonium Salts in Water, Acetonitrile, Methanol, and Ethanol over a Wide Concentration Range
Marvin Dorn, Sabine Kareth, Eckhard Weidner and Marcus Petermann*,
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引用次数: 0
Abstract
CO2 can be electrochemically converted to commodity chemicals with the support of aqueous or organic electrolytes. However, aqueous electrolytes mainly lead to H2 production due to the low solubility of CO2 in water whereas organic electrolytes favor the formation of organic products. In addition to selectivity, fast CO2 conversion is also important, which is significantly influenced by the conductivity of the electrolyte. However, the most studied electrolytes are aqueous and at low salt concentrations. Therefore, in this work, the electrical conductivity of 164 electrolytes was investigated in a wide concentration range and a temperature range T = (288.15 to 333.15 K) using automated conductometry. After the measurements, the results were correlated using the Casteel–Amis equation. This choice was made because many factors affecting conductivity are well documented in the literature but not universally quantifiable for all electrolytes due to isolated consideration. The wide variety of different electrolytes investigated in this study highlights the importance of considering these factors holistically rather than in isolation. Nevertheless, NaI and KSCN in methanol and (C2H5)4NBF4 in acetonitrile were identified as the three organic electrolytes with the highest conductivity. These solutions have the potential to be used as electrolytes for CO2 reduction.
期刊介绍:
The Journal of Chemical & Engineering Data is a monthly journal devoted to the publication of data obtained from both experiment and computation, which are viewed as complementary. It is the only American Chemical Society journal primarily concerned with articles containing data on the phase behavior and the physical, thermodynamic, and transport properties of well-defined materials, including complex mixtures of known compositions. While environmental and biological samples are of interest, their compositions must be known and reproducible. As a result, adsorption on natural product materials does not generally fit within the scope of Journal of Chemical & Engineering Data.