Modelling reversible cyclic voltammetry at the one-dimensional junction established by three phases: an organic liquid containing a neutral electroactive solute,an aqueous electrolyte solution,and an electronic conductor |
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| Institution: | 1. Institute of Nuclear Energy Research, Atomic Energy Council, 1000 Wenhua Rd., Chiaan Village, Lungtan, Taoyuan 325, Taiwan, ROC;2. Institute of Organic and Polymeric Materials, National Taipei University of Technology, 1 Sec. 3, Zhongxiao E. Rd., Taipei 10608, Taiwan, ROC;3. Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, 1 Sec. 3, Zhongxiao E. Rd., Taipei 10608, Taiwan, ROC;1. State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin, 130022, China;2. University of Chinese Academy of Sciences, Beijing, 100039, China;3. Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, 5625 Renmin Street, Changchun, 130022, PR China;4. Hawaii Natural Energy Institute, University of Hawaii - Manoa, Honolulu, HI 96822;1. Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany;2. Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120, Heidelberg, Germany;3. Centre for Advanced Materials, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 225, 69120, Heidelberg, Germany;1. Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo, 184-8588, Japan;2. Department of Chemistry, College of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima, 171-8501, Tokyo, Japan |
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| Abstract: | Scholz et al. (Electrochem. Commun. 2 (2000) 112) recently performed cyclic voltammetry on droplets of a solution of decamethylferrocene (dmfc) in nitrobenzene (nb) lying between graphite and an aqueous solution of potassium chloride. Those authors hypothesized that the reaction dmfc(nb)+Cl−(aq)→dmfc+(nb)+Cl−(nb)+e− took place at the hoop where the three phases meet. We have modelled this hypothesis on the basis that the cyclovoltammetric current is controlled by Nernst’s law and by the cylindrical diffusion of dmfc to, and of dmfc+Cl− from, the three-phase junction. Model and experiment do not match. |
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