Mercury-coated platinum microelectrodes for steady-state voltammetry in aqueous solutions at high temperature |
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| Affiliation: | 1. Department of Physical Chemistry, University of Venice, Calle Larga, S. Marta, 2137, 30123 Venice, Italy;2. Department of Environmental Science, University of Venice, Calle Larga, S. Marta, 2137, 30123 Venice, Italy;1. Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati 781039, India;2. Sustainable Environergy Research Lab (SERL), Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz-Khas, New Delhi 110016, India;1. State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Laboratory of Research on Utilization of Si-Zr-Ti Resources, Hainan University, 58 Renmin Road, Haikou 570228, China;2. Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, China;1. Center for Sustainable Future Technologies @POLITO, Istituto Italiano di Tecnologia, Via Livorno 60, 10144 Turin, Italy;2. Laboratory Materials for Energy Conversion, Swiss Federal Laboratories for Materials Science and Technology (Empa), Überlandstrasse 129, 8600 Dübendorf, Switzerland;3. Department of Applied Science and Technology, Politecnico di Torino, C.so Duca degli Abruzzi 24, 10129 Turin, Italy;1. Selcuk University, Department of Chemical Engineering, 42075, Konya, Turkey;2. Linz Institute for Organic Solar Cells (LIOS), Physical Chemistry, Johannes Kepler University Linz, Altenberger Strasse 69, A-4040 Linz, Austria;3. Institute for Chemical Technology of Inorganic Materials, Johannes Kepler University, Altenberger Straße 69, A-4040 Linz, Austria;4. Karamanoglu Mehmetbey University, Department of Metallurgical and Materials Engineering, 70100, Karaman, Turkey;1. College of Natural and Computational Science, Department of Chemistry, Jigjiga University, 1020 Jigjiga, Ethiopia;2. CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing 100190, China |
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| Abstract: | ![]()
Sphere-cap mercury microelectrodes fabricated on a platinum disk substrate were tested in aqueous solutions over the temperature range 295–353 K. The performance of these electrodes was assessed in solutions containing Ru(NH3)6Cl3 and LiClO4 as supporting electrolyte. From the steady-state limiting current obtained at three different mercury microelectrodes, the diffusion coefficient of the electroactive species at different temperatures was determined. It was found that the diffusion coefficient values were consistent with the Stokes–Einstein and activation energy models. The results obtained also allowed us to conclude that sphere-cap mercury microelectrodes can be useful for elevated temperature electroanalysis in aqueous solutions. |
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