Electrocatalytic oxidation of cellulose at a gold electrode

A1 Journal article (refereed)


Internal Authors/Editors


Publication Details

List of Authors: Yasuhito Sugano, Rose-Marie Latonen, Marceline Akieh-Pirkanniemi, Johan Bobacka, Ari Ivaska
Publisher: Wiley-VCH Verlag GmbH&Co. KGaA
Place: Weinheim
Publication year: 2014
Journal: ChemSusChem
Volume number: 7
Issue number: 8
Start page: 2240
End page: 2247
eISSN: 1864-564X


Abstract

The electrochemical properties of cellulose dissolved in NaOH solution at a Au surface were investigated by cyclic voltammetry, FTIR spectroscopy, the electrochemical quartz crystal microbalance technique, and electrical impedance spectroscopy. The reaction products were characterized by SEM, TEM, and FTIR and NMR spectroscopy. The results imply that cellulose is irreversibly oxidized. Adsorption and desorption of hydroxide ions at the Au surface during the potential cycling have an important catalytic role in the reaction (e.g., approach of cellulose to the electrode surface, electron transfer, adsorption/desorption of the reaction species at the electrode surface). Moreover, it was found that two types of cellulose derivatives were obtained as products. One is a water-soluble cellulose derivative in which some hydroxyl groups are oxidized to carboxylic groups. The other derivative is a water-insoluble hybrid material composed of cellulose and Au nanoparticles (4^^nm). Furthermore, a reaction scheme of the electrocatalytic oxidation of cellulose at a gold electrode in a basic medium is proposed.


Keywords

Biomass, Electrochemistry, Ethanol Oxidation, Gold, Nanoparticle

Last updated on 2019-14-11 at 03:20