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New efficient and low cost electro catalyst for ethanol and ethylene glycol oxidation based on Mn(II)Co(II)-modified montmorillonite

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Abstract

In the context to research new inexpensive and efficient electrocatalysts for direct liquid fuel cell applications, the electrocatalytic behaviour of a new carbon paste electrode modified with Co(II) and Mn(II) supported on montmorillonite (Co(II)Mn(II)Mt-CPE) was investigated as new efficient and low-cost modified electrode for ethanol and ethylene glycol electrocatalytic oxidation. The developed modified electrode Co(II)Mn(II)Mt-CPE showed excellent elect catalytic behaviour towards the electro-oxidation of ethanol and ethylene glycol in alkaline media, and the corresponding mechanism of electrocatalytic oxidation reactions was proposed. The morphology of the studied electrocatalyst was studied using scanning electron microscopy. The study of the scan rate effect on the voltammetric response of Co(II)Mn(II)Mt-CPE shows that the electro-oxidation reactions of ethanol and ethylene glycol are under adsorption control. The effect of the concentrations of ethanol and ethylene glycol on the oxidation peak current density was studied in the range 0.4–1.6 M, and the results show an enhancement of the peak current density up to 3.5 mA/cm2 after electrode surface regeneration. In addition, a new electrode surface regeneration method using chronoamperometry technique was successfully applied to eliminate the reactions intermediates and thus conserve the electrocatalytic activity of the electrode.

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Correspondence to A. Abbaci.

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The authors declare that they have no conflict of interest and declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Editorial responsibility: Maryam Shabani.

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13762_2022_4272_MOESM1_ESM.docx

Figure S1 EDS spectra of Na- montmorillonite (a) and MnCo- montmorillonite (b). Figure S2 Repeatability of voltammetric response of the modified electrode Co(II)Mn(II)Mt-CPE toward ethanol. Figure S3 Repeatability of voltammetric response of the modified electrode Co(II)Mn(II)Mt-CPE toward ethylene glycol. (DOCX 503 KB)

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Abbaci, A., Bouremmad, F. & Bouznit, Y. New efficient and low cost electro catalyst for ethanol and ethylene glycol oxidation based on Mn(II)Co(II)-modified montmorillonite. Int. J. Environ. Sci. Technol. 19, 10855–10868 (2022). https://doi.org/10.1007/s13762-022-04272-y

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  • DOI: https://doi.org/10.1007/s13762-022-04272-y

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