On the work function changes and other properties of the gas-exposed electrode surface in the NEMCA effect
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A simple model is developed to describe the backspillover of ionic species at the solid/gas interface as observed in non-Faradaic electrochemical modification of catalytic activity (NEMCA) systems. This model predicts a linear relationship between work function changes and changes in the potential difference at the metal/solid electrolyte interface, as observed experimentally. It also predicts a linear dependence of the surface coverage by ionic species on the potential difference at the metal/solid electrolyte interface, and a linear dependence of the binding energy of adsorbed species on the work function of the gas-exposed catalyst surface.
KeywordsNEMCA effect modelling effective double layer work function
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- 1.Vayenas, C.G., Jaksic, M.M., Bebelis, S., Neophytides, S.G. 1995Bockris, J.O’M.Conway, B.E.White, R.E. eds. Modern Aspects of ElectrochemistryPlenumNew York57202Google Scholar
- 2.Vayenas, C.G., Yentekakis, I.V. 1997Ertl, G.Knötzinger, H.Weitcamp, J. eds. Handbook of CatalysisVCHWeinheim13101338Google Scholar
- 3.C.G. Vayenas, S. Bebelis, I.V. Yentekakis and S. Neophytides, in: CRC Handbook on Solid State Ionics, eds. P.J. Gellings and H.J.M. Bouwmeester (CRC Press, Boca Raton, 1997), ch. 13, pp. 445-480.Google Scholar
- 14.The main resuslts of the present model were presented in the keynote lecture ‘NEMCA effect: why are the work function changes of the gas exposed catalyst-electrode surface one-to-one related to the changes in the catalyst working electrode potential?’ 55th Annual Meeting of the International Society of Electrochemistry, 19–24 September 2004, Thessaloniki, Greece.Google Scholar