Electrodeposited Ni on pencil graphite electrode for glycerol electrooxidation in alkaline media. (29th October 2021)

• Record Type: Journal Article
• Authors: Nacef, Mouna; Chelaghmia, Mohamed Lyamine; Khelifi, Omar; Pontié, Maxime; Djelaibia, Meriem; Guerfa, Randa; Bertagna, Valérie; Vautrin-Ul, Christine; Fares, Aissat; Affoune, Abed Mohamed
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 75(2021)
• Page Start: 37670
• Page End: 37678
• Publication Date: 2021-10-29
• Subjects: Glycerol electrooxidation -- Ni electrocatalyst -- Electrodeposition -- PGE -- Cyclic voltammetry -- Alkaline media; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.07.104
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: 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. Graphical abstract: Image 1 Highlights: 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.