Electrodeposited Ni on pencil graphite electrode for glycerol electrooxidation in alkaline media

In this study, we report the electrocatalytic oxidation of glycerol in alkaline solution onto Ni modified pencil graphite electrodes (Ni/PGEs). Field-emission gun scanning electron microscopy (FEG-SEM) and energy-dispersive X-ray spectroscopy (EDX), as well as cyclic voltammetry (CV) have been used...

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Bibliographic Details
Published in:International journal of hydrogen energy 2021-10, Vol.46 (75), p.37670-37678
Main Authors: Nacef, Mouna, Chelaghmia, Mohamed Lyamine, Khelifi, Omar, Pontié, Maxime, Djelaibia, Meriem, Guerfa, Randa, Bertagna, Valérie, Vautrin-Ul, Christine, Fares, Aissat, Affoune, Abed Mohamed
Format: Article
Language:English
Subjects:
Alkaline media
Chemical Sciences
Cyclic voltammetry
Electrodeposition
Glycerol electrooxidation
Ni electrocatalyst
PGE
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Summary:In this study, we report the electrocatalytic oxidation of glycerol in alkaline solution onto Ni modified pencil graphite electrodes (Ni/PGEs). Field-emission gun scanning electron microscopy (FEG-SEM) and energy-dispersive X-ray spectroscopy (EDX), as well as cyclic voltammetry (CV) have been used for the clarification of the physicochemical and electrochemical properties of Ni/PGEs. The electrocatalytic performance of Ni/PGEs towards glycerol electrooxidation was investigated using cyclic voltammetry and electrochemical impedance spectroscopy (EIS). Ni/PGE elaborated at pH = 6.92 showed the best performance for glycerol electrooxidation reaction in alkaline media. The direct comparison of glycerol, methanol, and ethanol electrooxidation revealed that glycerol is better than ethanol at 35 and 45 °C with a lower onset potentials and higher current densities. Ni/PGE characteristics surpass other nickel based electrodes and therefore promote its use as glycerol electrocatalyst. [Display omitted] •A low cost electrocatalyst is developed towards glycerol electrooxidation.•Simple method was used to deposit Ni on pencil graphite electrode with various pH.•pH deposition solution influences deposits morphology and characteristics.•Glycerol shows promising result on Ni/PGE in alkaline solution.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2020.07.104