Premium
Electrocatalytic Oxidation of Cellulose at a Gold Electrode
Author(s) -
Sugano Yasuhito,
Latonen RoseMarie,
AkiehPirkanniemi Marceline,
Bobacka Johan,
Ivaska Ari
Publication year - 2014
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201402139
Subject(s) - cellulose , cyclic voltammetry , adsorption , inorganic chemistry , chemistry , electrochemistry , dielectric spectroscopy , fourier transform infrared spectroscopy , hydroxide , quartz crystal microbalance , desorption , catalysis , electrode , chemical engineering , organic chemistry , engineering
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 electrochemical 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 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, 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.