论文标题
通过阻抗光谱测量的电解溶液中重组系数的测定
Determination of the recombination coefficient in electrolytic solutions from impedance spectroscopy measurements
论文作者
论文摘要
实验研究了实际/有效离子浓度对标称盐浓度的依赖性，用于NaCl和KCl的水溶液。实际的离子体积密度是通过使用两种用于数据分析的方法来确定阻抗光谱技术的方法：一种第一种方法仔细检查细胞的电阻抗谱的真实部分的平台，而当障碍在串联表示中写下障碍时的掺杂剂的体积密度。第二个是通过使用Poisson-Nernst-Planck模型从同时拟合阻抗谱的真实和虚构部分的离子密度来提取离子密度的第二个。该过程的有效性是基于以下假设：扩散系数和介电常数均与探索浓度范围内的盐浓度无关。我们的实验结果表明，一阶反应很好地描述了解离现象。已经计算了反应的分离缔合比率。与线性的偏差出现在MM的顺序相当低。
The dependence of the actual/effective ionic concentration on the nominal salt concentration is experimentally investigated for aqueous solutions of NaCl and KCl. The actual ionic bulk density is determined by means of the impedance spectroscopy technique using two approaches for the data analysis: A first approach scrutinizing the real part's plateau of the cell's electric impedance spectrum versus the bulk density of dopant when the impedance is written in the series representation. A second one via extraction of the ionic density from simultaneously fitting of the real and imaginary parts of the impedance spectrum by using the Poisson-Nernst-Planck model. The validity of this procedure reposes on the hypothesis that both the diffusion coefficient and the dielectric constant are independent from the salt concentration in the explored range of concentrations. Our experimental results indicate that a first-order reaction describes well the dissociation phenomenon. The dissociation-association ratio of the reaction has been calculated. Deviations from linearity appear at rather low concentrations of the order of mM.
