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Hydrogen evolution in aqueous solutions containing dissolved CO2: Quantitative contribution of the buffering effect

Abstract : The hydrogen evolution reaction (HER) occurring on steel in an oxygen-free aqueous solution containing dissolved CO2 was investigated. This reaction was modelled by taking into account the two dissociation reactions of dissolved CO2. The mathematical problem was solved numerically using a finite element method (FEM). A fair agreement between the measurements performed on a steel rotating disc electrode and the theoretical calculations was obtained. Thus, the cathodic behaviour of steel in CO2-containing solutions can be fully explained by the buffering effect induced by the presence of CO2. Some interfacial pH measurements performed on a gold electrode also support this conclusion.
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https://hal-ifp.archives-ouvertes.fr/hal-02419557
Contributor : Nadine Couëdel <>
Submitted on : Thursday, December 19, 2019 - 3:22:00 PM
Last modification on : Wednesday, July 29, 2020 - 2:02:05 PM

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Elias Remita, Bernard Tribollet, Sutter Eliane, Vincent Vivier, Francois Ropital, et al.. Hydrogen evolution in aqueous solutions containing dissolved CO2: Quantitative contribution of the buffering effect. Corrosion Science, Elsevier, 2008, 50 (5), pp.1433-1440. ⟨10.1016/j.corsci.2007.12.007⟩. ⟨hal-02419557⟩

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