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一前言对于高温(如大于100℃)水溶液体系的电化学的重要性,近十余年来有了进一步的认识。例如,对于不同温度下电极性能的研究、不同温度时的电氧化还原反应的研究、高温下电位—pH图的制作和应用等等都需要不同温度下的热力学数据以及电极电位、活度系数、电离常数、电离度数据,这些数据对电化学的研究部是十分重要的。不同温度下电化学数据,例如,不同温度下的电极电位数据可以通过实验方法,即测定不同温度下的电池的电动势,然后用最小二乘法找出适合该电极的电极电位的幂级数方程。如我们常用的参比电极之一,氯化银电极,Greeley测定了下列电池在25°～275℃时的电动势。
A foreword For more than ten years the electrochemical importance of aqueous solutions of high temperature (such as greater than 100 ℃) has been further recognized. For example, studies on electrode performance at different temperatures, studies on electrooxidation and reduction at different temperatures, production and application of potential-pH diagrams at high temperature, and the like all require thermodynamic data at different temperatures as well as electrode potentials, activity coefficients, Ionization constant, ionization data, these data are very important for the electrochemical research department. Electrochemical data at different temperatures, for example, electrode potential data at different temperatures, can be determined experimentally by determining the electromotive force of the battery at different temperatures and then using the least-squares method to find the power series equation suitable for the electrode potential of the electrode. As one of our commonly used reference electrodes, silver chloride electrodes, Greeley measured the electromotive force of the following cells at 25 ° to 275 ° C.