Multimetal high-entropy alloys (HEAs) have been recognized as potential catalysts that can possibly replace the conventional metal oxides and noble metals for use in energy conversion and water splitting such as oxygen evolution reactions (OERs).

Activity coefficients at infinite dilution of 17 polar solutes included linear and branched C1 to C5 alcohols, chlorinated methane, acetone, acetonitrile, ethyl acetate, 1,4-dioxane, and cyclohexanone in the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate were determined by gas chromatography using the ionic liquid as the stationary phase. The measurements were carried out at temperatures between (303.15 and 343.15) K. From the temperature dependence of the limiting activity coefficients, partial molar excess enthalpies at infinite dilution of the organic solutes in the ionic liquid have been derived.

Activity coefficients at infinite dilution γ i ∞ have been measured for 17 organic solutessalkanes, alkenes, and alkyl benzenessin the ionic liquid 1-butyl-3-methylimidazolium trifluoromethanesulfonate ([BMIM][CF 3 SO 3 ]) by the gas-liquid chromatographic method with the ionic liquid as the stationary phase. The measurements were carried out from (303.15 to 363.15) K. The partial molar excess enthalpies at infinite dilution H i E,∞ of the solutes in the ionic liquid were also derived from the temperature dependence of the γ i ∞ values.

The solubilities of 1,3-benzenedicarboxylic acid (isophthalic acid) in water, acetic acid, and acetic acid + water solutions with mass fractions of acetic acid on a solute-free basis of 0.2056, 0.4083, and 0.6082, respectively, were measured. The concentration of the solution was determined by a gravimetrical method. The measured solubility of isophthalic acid in water agrees with that reported in the literature. The logarithm of the solubility data shows good linearity against temperature.

No abstract