Examination of the electrochemical reactivity of screen printed carbon electrode treated by radio-frequency argon plasma |
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| Institution: | 1. University of Tartu, Institute of Physics, W. Ostwaldi Str. 1, 50411 Tartu, Estonia;2. Tallinn University of Technology, Department of Chemical Engineering, Ehitajate tee 5, 19086 Tallinn, Estonia;3. Tallinn University of Technology, Institute of Geology, Ehitajate tee 5, 19086 Tallinn, Estonia;4. University of Heidelberg, Institute of Environmental Physics, Neuenheimer Feld 229, D-69120 Heidelberg, Germany;5. Viimsi Vesi Ltd., Nelgi Str. 1, Viimsi parish, 74001 Harju County, Estonia;6. Hungarian Academy of Sciences, Institute for Geological and Geochemical Research, Budaörsi út 45., H-1112 Budapest, Hungary. |
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| Abstract: | The surface of screen printed carbon electrode (SPCE) with partially blocked surface was treated by argon plasma in order to improve their electrochemical performances. The argon plasma was generated by a radio-frequency electrical discharge at low pressure. Study of the electrode surface by scanning electronic microscopy (SEM) has revealed a significant change of the morphology of the SPCE surface after plasma pre-treatment. The electrochemical reactivity of the SPCEs was characterized using cyclic voltammetry. A drastic enhancement of the SPCEs electrochemical reactivity was highlighted after plasma pre-treatment. The effect of biasing the SPCE surface during the plasma treatment has been investigated and showed that depending on the nature of plasma treatment, the same electrode could show a radial or planar diffusion. |
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