Journal of Electrochemical Science and Technology

  • 제13권3호
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  • Pages.347-353
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  • 2022
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  • 2093-8551(pISSN)
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  • 2288-9221(eISSN)
한국전기화학회 (The Korean Electrochemical Society)
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Mass Transport Properties and Influence of Natural Convection for Voltammetry at the Agarose Hydrogel Interface

  • Kim, Byung-Kwon (Department of Chemistry and Nanoscience, Ewha Womans University) ;
  • Park, Kyungsoon (Department of Chemistry and Cosmetics, Jeju National University)
  • 투고 : 2022.02.17
  • 심사 : 2022.03.15
  • 발행 : 2022.08.28
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초록

Agarose hydrogel, a solid electrolyte, was investigated voltammetrically in terms of transport properties and natural convection effects using a ferrocenyl compound as a redox probe. To confirm the diffusion properties of solute on the agarose interface, the diffusion coefficients (D) of ferrocenemethanol in agarose hydrogel were determined by cyclic voltammetry (CV) according to the concentration of agarose hydrogel. While the value of D on the agarose interface is smaller than that in the bulk solution, the square root of the scan rate-dependent peak current reveals that the mass transport behavior of the solute on the agarose surface shows negligible convection or migration effects. In order to confirm the reduced natural convection on the gel interface, scan rate-dependent CV was performed in the solution phase and on the agarose surface, respectively. Slow scan voltammetry at the gel interface can determine a conventional and reproducible diffusion-controlled current down to a scan rate of 0.3 mV/s without any complicated equipment.

키워드

과제정보

K.P. acknowledges the support from Basic Science Research Program to Research Institute for Basic Sciences (RIBS) of Jeju National University through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2019R1A6A1A 10072987). B.K. was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2021R1A6A1A10039823) and by the National Research Foundation (NRF) of Korea, which is funded by the Ministry of Science and ICT (NRF-2021R1A2C4002069). This work was supported by the Ewha Womans University Research Grant of 2021.

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