Bulletin of the Korean Chemical Society

  • 제31권9호
  • /
  • Pages.2553-2556
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  • 2010
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  • 0253-2964(pISSN)
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  • 1229-5949(eISSN)
대한화학회 (Korean Chemical Society)
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Ionic Size Effect on the Double Layer Properties: A Modified Poisson-Boltzmann Theory

  • Lou, Ping (Department of Chemistry, Sungkyunkwan University) ;
  • Lee, Jin-Yong (Department of Chemistry, Sungkyunkwan University)
  • 투고 : 2010.05.28
  • 심사 : 2010.07.22
  • 발행 : 2010.09.20
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초록

On the basis of a simple modified Poisson-Boltzmann (SMPB) theory, taking into account the finite ionic size, the analytic expression for the effect of ionic size on the diffuse layer potential drop at negative charge densities has been given for the simple 1:1 electrolyte. It is shown that the potential drop across the diffuse layer depends on the size of the ions in the electrolyte. For a given electrolyte concentration and electrode charge density, the diffuse layer potential drop in a small ion system is smaller than that in a large ion system. It is also displayed that the diffuse layer potential drop is always less than the value of the Gouy-Chapman (GC) theory, and the deviation increases as the electrode charge density increases for a given electrolyte concentration. These theoretical results are consistent with the results of the Monte-Carlo simulation [Fawcett and Smagala, Electrochimica Acta 53, 5136 (2008)], which indicates the importance of including steric effects in modeling diffuse layer properties.

키워드

참고문헌

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  2. Generalized Poisson—Boltzmann Equation Taking into Account Ionic Interaction and Steric Effects vol.58, pp.3, 2012, https://doi.org/10.1088/0253-6102/58/3/20
  3. The impact of the modified Poisson–Boltzmann model on protein bound to a lipid coated silicon nanowire field effect transistor biosensor in an electrolyte environment pp.1029-0451, 2018, https://doi.org/10.1080/00319104.2018.1464162
  4. How Ionic Polarization Affects Stern Potential: An Insight into Hofmeister Effects vol.80, pp.5, 2016, https://doi.org/10.2136/sssaj2016.04.0095