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Scaling Relation between Electrochemical Seebeck Coefficient for Fe2+/Fe3+ in Organic Solvent and Its Viscosity
Journal of the Physical Society of Japan ( IF 1.7 ) Pub Date : 2021-02-26 , DOI: 10.7566/jpsj.90.033602
Dai Inoue 1 , Hideharu Niwa 1, 2, 3 , Hiroaki Nitani 4 , Yutaka Moritomo 1, 2, 3
Affiliation  

The temperature coefficient α (= dV/dT) of the redox potential (V) in a redox system, or so-called electrochemical Seebeck coefficient, is a key parameter for thermal energy harvesting. We systematically investigated α for Fe2+/Fe3+ in 16 organic solvents, i.e., 8 protic and 8 aprotic solvents. We found that α shows remarkable solvent dependence and is distributed from 0.14 mV/K for glycerin to 3.60 mV/K for acetone. We further found a scaling relation between α and viscosity (η) of the solvent as αη−0.4. We will discuss solvent dependence of α and the scaling relation in terms of the configuration entropy of the solvent molecules.

中文翻译:

有机溶剂中Fe2 + / Fe3 +的电化学塞贝克系数与粘度的比例关系

氧化还原系统中氧化还原电势(V)的温度系数α(= d V / d T),即所谓的电化学塞贝克系数,是收集热能的关键参数。我们系统地研究了16种有机溶剂(即8种质子和8种非质子溶剂)中的Fe 2+ / Fe 3+的α值。我们发现,α显示出显着的溶剂依赖性,并且从甘油的0.14 mV / K分布到丙酮的3.60 mV / K。我们进一步发现之间的标度关系α和粘度(η,溶剂的),为α α η -0.4。我们将根据溶剂分子的构型熵来讨论α的溶剂依赖性和比例关系。
更新日期:2021-02-26
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