纤维素
循环伏安法
吸附
无机化学
化学
电化学
介电谱
傅里叶变换红外光谱
氢氧化物
石英晶体微天平
解吸
催化作用
电极
化学工程
有机化学
物理化学
工程类
作者
Yasuhito Sugano,Rose‐Marie Latonen,Marceline Akieh‐Pirkanniemi,Johan Bobacka,Ari Ivaska
出处
期刊:Chemsuschem
[Wiley]
日期:2014-06-06
卷期号:7 (8): 2240-2247
被引量:25
标识
DOI:10.1002/cssc.201402139
摘要
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 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.
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