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Impacts reveal and quantify monolayer adsorption on single alumina particles

Abstract

A particle impact method is used to quantify adsorption of redox active species on single insulating particles by simulation of individual spike transient, circumventing the complexity of measurements with ensembles of particles. For catechol, anthraquinone and chloranil molecules and the ferrocene moiety of poly(vinylferrocene) adsorbed on alumina, the surface coverages are found to be (3.0 ± 0.9), (1.5 ± 1.4), (2.7 ± 1.7) and (2.1 ± 0.7) × 10–10 mol cm–2, and the charge diffusion coefficients are found as (2.5 ± 0.5), (7.9 ± 4.0), (0.4 ± 0.2) and (2.4 ± 0.8) × 10–6 cm2 s–1, respectively.

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Correspondence to Richard G. Compton.

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This paper is the authors’ contribution to the special issue of Russian Journal of Electrochemistry dedicated to the 100th anniversary of the birth of the outstanding Soviet electrochemist Veniamin G. Levich.

Published in Russian in Elektrokhimiya, 2017, Vol. 53, No. 9, pp. 1114–1123.

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Lin, Q., Compton, R.G. Impacts reveal and quantify monolayer adsorption on single alumina particles. Russ J Electrochem 53, 994–1002 (2017). https://doi.org/10.1134/S1023193517090087

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  • DOI: https://doi.org/10.1134/S1023193517090087

Keywords

  • particle impacts
  • chronoamperometry
  • adsorption
  • monolayer
  • coverage
  • charge diffusion