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Article Dans Une Revue Journal of Electroanalytical Chemistry Année : 2019

An in situ IR-Vis Sum Frequency Generation Spectroscopy study of cyanide adsorption during zinc electrodeposition

Résumé

In this paper, we demonstrate the feasibility of in situ non-linear IR-Vis Sum Frequency Generation (SFG) Spec-troscopy investigations at zinc surfaces in electrochemical ambient. We investigated both zinc electrodeposition onto an extraneous electrode and adsorption on polycrystalline zinc. Electrodeposition studies were carried out onto a polycrystalline gold cathode in contact with a Zn-cyanocomplex solution containing free CN − , while ad-sorption studies were carried out on a polycrystalline zinc electrode in contact with a free-CN − solution. In both experiments, we monitored the spectroscopic features associated with the internal stretching of the adsorbed cyanide (ca. 2100 cm −1) that we exploited as local Au and Zn site probes. Spectroelectrochemical results were complemented by cyclic voltammetric measurements. This proof-of-principle study is encouraging in the view of more concrete applications regarding additive adsorption at zinc electrodes, aiming at a fundamental understanding of the cycling stability of zinc battery anodes.
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hal-02368279 , version 1 (09-06-2020)

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F. Rossi, M. Bevilacqua, Bertrand Busson, M. Corva, A. Tadjeddine, et al.. An in situ IR-Vis Sum Frequency Generation Spectroscopy study of cyanide adsorption during zinc electrodeposition. Journal of Electroanalytical Chemistry, 2019, 855, pp.113641. ⟨10.1016/j.jelechem.2019.113641⟩. ⟨hal-02368279⟩
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