化学学报 ›› 1993, Vol. 51 ›› Issue (2): 150-154. 上一篇    下一篇

研究论文

不饱和醇电还原质谱-电化学循环伏安(MSCV)法研究:I.烯丙醇的电还原

陈剑;刘佩芳;王辉;查全性   

  1. 武汉大学化学系电化学研究室
  • 发布日期:1993-02-15

MSCV studies of electroreduction of unsaturated alcohols:I.electroreduction of allyl alcohol

CHEN JIAN;LIU PEIFANG;WANG HUI;CHA QUANXING   

  • Published:1993-02-15

用MSCV法研究了烯丙醇在多孔Pt电极上0.5ol.dm^-3HCLO4中的电还原。烯丙醇电还原时主要涉及二类反应:烯丙基上C-OH断键生成丙烯; 丙烯进一步氢化生成丙烷。表征丙烯及丙烷的诸碎片M/Z的质谱电流(IM)-电极电位(Φ)扫描曲线线详细描绘了各分步反应的状况。在一定电位范围, 各M/Z的lgIM-Φ呈线性; 求得各有关M/Z的Tafel斜率。根据实验结果对反应机理进行了详细分析。

关键词: 反应机理, 烯丙醇, 电还原, 不饱和醇, 质谱-电化学循环伏安法

The electroreduction of allyl alcohol was studied using MSCV (Mass spectrome-tric cyclic voltammetry) technique at porous Pt electrodes on 0.5mol.dm^-3 HCLO4.Two types of reactions are mainly involved in the reduction of allyl alcohol:C-OH bond cleavage from allyl group with formation of propene and the hydrogenation of propene to propane the mass sectrometric current (IM)-Φ(potential) curves of the fragments provide detailed information for some of the partial reactions. for all the M/Z values studied the log IM-Φ relations exhibit a linear range and their tafel slops were obtained. possible reaction mechanisms are proposed based on experimental results.

Key words: REACTION MECHANISM, ALLYL ALCOHOL, ELECTROLYSIS OF CHLORIDE

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