2, 2, 6, 6-Tetramethyl piperidine-1-oxyl mediated electrocatalytic oxidation of ethylene glycol in water and dichloromethane. (26th January 2017)

• Record Type: Journal Article
• Authors: Zhang, Wenbin; Xiong, Zhixing; Zhang, Zhangcai; Gao, Hang
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 4(2017)
• Page Start: 2134
• Page End: 2138
• Publication Date: 2017-01-26
• Subjects: TEMPO -- Ethylene glycol -- Carbonate buffer solution -- Dichloromethane solution -- Electrocatalytic oxidation; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2016.11.165
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: 2, 2, 6, 6-Tetramethylpiperidinyl-N-oxyl (TEMPO) mediated electrocatalytic oxidation toward ethylene glycol was investigated as a function of electrolyte (aqueous carbonate buffer solution of pH 9.6 and dichloromethane solution with 2, 6-lutidine as the base) by cyclic voltammetry and chronoamperometry. Both half-wave potentials and potential separations of electrochemical oxidation of TEMPO in these two electrolytes show differently. Electrocatalytic oxidation of ethylene glycol mediated by TEMPO was firstly reported here, it was observed the onset potential of this electrocatalytic oxidation reaction in dichloromethane solution is larger than that in carbonate buffer solution, moreover, electrocatalytic oxidation rate constant is calculated from chronoamperograms to be 1.63 × 10 3 L·mol −1 ·s −1 in carbonate aqueous buffer solution, which is forty times as large as that in dichloromethane solution. Highlights: Solvent effect on the oxidation of TEMPO were studied. Ethylene glycol can be electrochemically catalyzed by TEMPO. Catalytic abilities of TEMPO toward ethylene glycol are electrolyte dependent.