化工学报 ›› 2008, Vol. 59 ›› Issue (S1): 88-92.

• 材料化学工程与纳米技术 • 上一篇    下一篇

活性氧化镍电极电催化合成二甘醇酸

赵峰鸣;李姗姗;朱英红;马淳安   

  1. 浙江工业大学应用化学系
  • 出版日期:2008-06-30 发布日期:2008-06-30

Electro-catalytic synthesis of diglycolic acid on active nickel-oxide electrode in alkaline medium

ZHAO Fengming;LI Shanshan;ZHU Yinghong;MA Chun’an   

  • Online:2008-06-30 Published:2008-06-30

摘要:

通过电化学氧化还原技术将镍电极进行活化制备活性氧化镍电极,结合AFM、循环伏安和恒电流电解等技术研究了二甘醇在NaOH溶液中电催化氧化合成二甘醇酸。结果表明,经活化后的镍电极对二甘醇具有较高的电催化活性,镍电极经15 min活化处理后的电催化活性最佳。获得的最佳电解工艺条件为:电流密度17 mA·cm-2,电解反应温度60℃,二甘醇浓度0.3 mol·L-1,NaOH浓度2 mol·L-1,此时二甘醇酸的收率为66.7%,电流效率为66.1%,二甘醇的转化率达89%。

关键词: 有机电化学, 电催化, 活化, 二甘醇酸

Abstract:

Active nickel-oxide electrodes prepared by electrochemical oxidation-reduction exhibited electro-catalytic activity for the oxidation of diethylene glycol to diglycolic acid in alkaline mediumAtomic force microscopy (AFM),cyclic voltammetry and galvanostatic electrolysis were used to study the surface characterization of active nickel-oxidation electrode and electrochemical performance toward oxidation of diethylene glycolThe results show that nickel-oxide hydroxide layer formed at the surface of electrode behaves as an efficient electro-catalyst for the oxidation of diethylene glycol to diglycolic acid in alkaline mediumThe effects of various parameters such as time of activation,current density,diethylene glycol concentration and medium temperature on the electro-oxidation of diethylene glycol were investigated Depending upon the experimental conditions,the yield of dilycolic acid was 66.7% with the current efficiency of 66.1% and conversion efficiency of 89%

Key words: 有机电化学, 电催化, 活化, 二甘醇酸