铂碳电极苯/水体系阴极反应规律的研究  

Preparation of Electrode for Electrocatalytic Hydrogenation of Benzene

作　　者：俞英[1] 黄海燕[1] 

机构地区：[1]中国石油大学(北京)重质油国家重点实验室,北京102249

出　　处：《西安交通大学学报》2008年第8期1040-1043,共4页Journal of Xi'an Jiaotong University

基　　金：国家重点基础研究发展规划资助项目(TG2000026409);石油科技中青年创新基金资助项目(05E7022);北京市教委共建项目(XK114140479)

摘　　要：以铂碳电极为基础,研究了苯/水体系阴极电催化加氢反应的动力学基本规律,考察了反应温度、阴极电势等因素对苯加氢反应的影响.电解反应的结果表明:随着原料中苯蒸气质量分数的增加,苯加氢电流呈逐渐增加的趋势,当苯蒸气的质量分数增至25%左右时,苯加氢电流的上升趋势减缓;随着反应温度的升高,苯加氢电流持续增加,苯加氢反应的表观活化能为32.88 kJ/mol,析氢反应的表观活化能为18.08 kJ/mol;随着阴极电势的增加,加氢电流在-1.0 V出现一个最大值,而后略有下降.The electrochemical coupling of water electrolysis and benzene hydrogenation reaction on platinum carbon electrode is studied. The influence of the reaction temperature and the cathode potential on benzene hydrogenation are investigated. The results of electrolysis experiments show that the current of benzene hydrogenation increases as the mass fraction of benzene increases, and the increasing tendency slows down when the mass fraction of benzene reaches 250/00. The current of benzene hydrogenation continuously increases as the reaction temperature increa- ses. The activation energy of hydrogenations reaction is 32.88 kJ/mol and the activation energy of hydrogen evolution reaction is 18.08 kJ/mol. The hydrogenation current reaches a peak value at the cathode potential -1.0 V and then has a slight drop.

关 键 词：电催化 苯加氢 电极 

分 类 号：TK91[动力工程及工程热物理]