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CONSTITUTION OF NEW ELECTROCHEMICAL SYSTEM USING A HYDROGEN STORAGE METAL (ALLOY) AND THREE-DIMENSIONAL EXPANSION OF THE REACTION FIELD

储氢金属（合金）新型电化学体系的构建及反应场的三维扩展

基本信息

批准号：
09650927
负责人：
IWAKURA Chiaki
金额：
$ 2.18万
依托单位：
Osaka Prefecture University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

项目摘要

We have already succeeded in constitution of successive electrochemical hydrogenation system of styrene using Pd or hydrogen storage alloy sheet electrodes. In the present study, the electrochemical hydrogenation system was applied to the other unsaturated organic or inorganic compounds, and effect of three-dimensional expansion of the reaction field on the hydrogenation rate and reaction selectivity were investigated. The results obtained in this study for two years are summarized as follows.1. Hydrogenation of various unsaturated organic or inorganic compounds with C=C, (C=0 or N=N bond successively proceeded using our electrochemical hydrogenation system, and the hydrogenation rate was influenced by the nature of double bond and substrate molecule. This strongly indicates that the electrochemical hydrogenation system is applicable to all unsaturated organic or inorganic compounds.2. The hydrogenation rate of 4-methylstyrene and 2-octene using this system increased up to around fifty times with the amount of Pd black deposits on the hydrogenation side of a Pd sheet electrode. This is ascribed to the three-dimensional expansion of the reaction field. The hydrogenation rate was also increased markedly by modifying small amount of Pt or Au deposits on the Pd sheet electrode.3. The deposition of Pt, Au, Cu or Ni on the Pd or palladized Pd sheet electrode led to the remarkable increase in the reduction rate of CO_2 and NO_3 ions and the appearance of the reaction selectivity depending on the nature of the deposited metals.

我们已经成功地用钯或贮氢合金片电极建立了苯乙烯连续电化学加氢体系。本研究将电化学加氢系统应用于其他不饱和有机或无机化合物，考察了反应场的三维扩展对加氢速率和反应选择性的影响。本研究历时两年，所取得的研究成果总结如下.利用电化学加氢系统对各种含C=C，（C=0或N=N）键的不饱和有机或无机化合物进行了连续加氢，加氢速率受双键性质和底物分子性质的影响。这有力地表明电化学加氢体系适用于所有不饱和有机或无机化合物.使用该系统的4-甲基苯乙烯和2-辛烯的氢化速率随着Pd片电极的氢化侧上的Pd黑沉积物的量增加而增加至约50倍。这归因于反应场的三维扩展。在Pd片电极上修饰少量Pt或Au沉积物也可显著提高加氢速率. Pt、Au、Cu或Ni在Pd或钯化Pd电极上的沉积，使CO_2和NO_3离子的还原速率显著提高，并表现出依赖于沉积金属性质的反应选择性。