| 乙炔在铜/石墨阴极上的电催化还原加氢和电引发聚合 |
| ELECTROCATALYTIC REDUCTION AND ELECTROINITIATED POLYMERIZATION OF ACETYLENE ON COPPER/GRAPHITE ELECTRODES |
|
| 摘要: 采用恒电位电解方法,分别在酸性和碱性两种饱和乙炔的水介质中,探讨了乙炔在铜/石墨阴极上(石墨上电沉积铜和石墨一铜层状嵌入物)的电催化还原和电引发聚合行为。电极对乙炔还原成乙烯表现较高活性和很高选择性(～99%,对气相产物)。对电极上活性组份Cu0(或Cu1)与乙炔分子可能发生的σ—π活化作用和加氢方式进行了讨论。本文还运用现场与非现场Raman光谱技术,考察了在乙快还原的同时,电极表面上形成聚乙炔复盖物的情况,提出了一种电引发聚合机理,能较好地解释实验事实。 |
| 关键词: 乙炔 加氢 铜/石墨电极 电催化还原 电引发聚合 |
| 基金项目: 中国科学院科学基金资助课题 |
| Abstract: With the method of potentiestatic electorlysis,behaviours of the electro-catalytic reduction and electroinitiated polymerization of acetylene on copper/graphite cathodes,which were prepared by the electrodeposition of copper on graphite or the intercalation of copper in the layers of graphite,have been investigated in the acidic and basic solutions saturated with acetylene respectively. It has been shown that the electrodes have a relatively high activity and very high selectivity for the electrocatalytic reduction of acetylene toethylene. The possible σ-π interaction between acetylene and Cu(0)[or Cu(I)] on the electrodes and the pathways of cathodic hydrogenation are discussed. The formation of polyacetylene on the electrodes has been studied by both in-situ and ex-situ Raman spectroscopic techniques. A mechanism of electroinitiated polymerization is proposed,which can give a reasonable explaination for the experimental results. |
| Keywords: acetylene copper/graphite electrode electrocatalytic reduction elect reinitiated polymerization hydrogenation |
| 投稿时间：1985-05-06 |
| 摘要点击次数: 1603 |
| 全文下载次数: 2198 |
| 钟传建,张朝炎,严兴国,许丁友,王仲权.乙炔在铜/石墨阴极上的电催化还原加氢和电引发聚合[J].无机化学学报,1985,1(1):113-121. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
