| 查晓松.化学通报,2020,83(2):172-178. |
| 铁基双金属材料还原降解三溴甲烷的研究 |
| Reductive Dehalogenation of Bromoform by Iron Based Bimetallic Materials |
| 投稿时间：2019-09-30 修订日期：2019-12-10 |
| DOI： |
| 中文关键词: 铁基双金属材料 溴仿 还原去除 |
| 英文关键词:Iron-based bimetallic materials Bromoform Reductive dehalogenation |
| 基金项目:漳州市自然科学基金项目（ZZ2019J11）资助 |
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| 中文摘要: |
| 本文制备了Cu/Fe和Pd/Fe两种铁基双金属材料，考察它们对溴仿（CHBr3）的还原去除效果。结果表明，溴仿的还原去除效果都随双金属材料投加量的增加而增加；溶液中H+浓度越高，越有利于还原反应的进行；溶解氧的存在会对还原去除反应产生抑制作用。双金属材料与溴仿的还原去除反应包括直接还原和间接还原两种途径。Pd和Cu通过与零价铁组成原电池结构加快了零价铁在水中的腐蚀速度，从而增强了零价铁对溴仿的直接还原去除效果。Pd与Cu相比，具有更高的氢过电位，氢气更容易在Pd的表面生成，而氢气也可以作为还原剂，取代溴仿分子中的溴原子，完成还原脱卤。因此，Pd/Fe双金属材料对溴仿的还原去除效果要好于Cu/Fe双金属材料。 |
| 英文摘要: |
| In this paper, iron based bimetallic materials (Cu/Fe and Pd/Fe) were prepared and their reductive dehalogenation effects on bromoform was investigated. The reduction effect of Cu/Fe and Pd/Fe bimetal materials on bromoform will increase as the addition amount of bimetal increases; the presence of high concentration of H+ in the solution is conducive to the reduction; furthermore, the presence of dissolved oxygen has a inhibitory effect on reductive dehalogenation. The reductive dehalogenation between bimetallic materials and bromoform includes direct reduction and indirect reduction. Bimetallic materials achieved high performance because galvanic cells were created between Fe (serving as an anode) and plating elements (serving as a cathode). This structure enhanced the reducibility of iron for reductive dehalogenation by facilitating iron corrosion. The Pd/Fe system showed a better performance than Cu/Fe, which was attributed to a higher potential gradient that promoting the hydrogen production. |
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