Ultrasonic Effects on Electrolysis of MV2+ in Surfactant and Polymer Solutions

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  • Aita Tadahiro
    Department of Materials Science and Engineering, Yamagata University
  • Wagatsuma Shinya
    Department of Materials Science and Engineering, Yamagata University
  • Hino Eri
    Department of Materials Science and Engineering, Yamagata University
  • Higuchi Takeshi
    Department of Materials Science and Engineering, Yamagata University
  • Sato Shimio
    Department of Materials Science and Engineering, Yamagata University

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Ultrasonic effects on electrolysis of methyl viologen (MV2+) in surfactant and polymer solutions were investigated using an ultrasonic vibrating electrode (USVE). Addition of an anionic polymer or surfactants decreased the efficiency of the electrolysis of MV2+ due to a complex formation between MV2+ and the additives and, at a certain [additive]/[MV2+] ratio, the complex was adsorbed on the electrode. CV measurements using the USVE showed that ultrasonic irradiation increased the efficiency of the electrolysis greatly but was not able to avoid the adsorption of the complex on the electrode. Optical reflection measurements around the USVE indicated that the ultrasonic irradiation caused little change in the concentration of free MV2+ around the electrode. The results showed that the ultrasonic irradiation increased the efficiency of the electrolysis by promotion of mass transport around the electrode, while it was doubted that the irradiation increased the efficiency through decomposition of the complexes.

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