The electrocatalytic dechlorination of chloroacetic acids at electrodeposited Pd/Fe-modified carbon paper electrode
文献类型：期刊论文
| 作者 | Li, Angzhen ; Zhao, Xu ; Hou, Yining ; Liu, Huijuan ; Wu, Liyuan ; Qu, Jiuhui |
| 刊名 | APPLIED CATALYSIS B-ENVIRONMENTAL
 |
| 出版日期 | 2012 |
| 卷号 | 111页码:628－635 |
| 关键词 | Pd/Fe-modified carbon paper electrode Electrocatalytic dechlorination Chloroacetic acids Direct reduction Indirect reduction |
| ISSN号 | 0926-3373 |
| 中文摘要 | Pd/Fe-modified carbon paper (Pd/Fe-C) electrode was prepared from PdCl2 and FeSO4 via electrodeposition onto carbon paper. It was observed that the diameters of electrodeposited Pd/Fe particles were around 20 nm with a uniform distribution on carbon paper, which is smaller than Pd/Fe particles of impregnated and calcined electrode. The electrodeposited Pd/Fe-C electrode exhibited higher activity in dechlorination of chloroacetic acids than impregnated and calcined electrode. Under optimal experiment conditions of Pd:Fe molar ratio of 2:1 at -1.5 V (vs SCE), 95% of trichloroacetic acid (TCAA) with the initial concentration of 500 mu g/L was removed within 20 min at pH 3. The dechlorination of chloroacetic acids followed the order of TCAA > dichloroacetic acid (DCAA) > monochloroacetic acid (MCAA). MCAA cannot be dechlorinated at C and Fe-C electrodes via direct reduction. However, a part of chloroacetic acids was directly dechlorinated to acetic acid at Pd-C and Pd/Fe-C electrodes via indirect reduction. The Pd(O) and Pd(II) species were detected by X-ray photoelectron spectroscopy. Compared with the individual Pd-C electrode, in situ formation of Fe(0) decreased the interface impedance as observed by electrochemical impedance spectroscopy analysis. In conclusion, the presence of Pd(0) nanoparticles played a significant role in forming atomic H+ to realize indirect reduction process which could achieve the complete dechlorination of chloroacetic acids. (C) 2011 Elsevier B.V. All rights reserved. |
| WOS记录号 | WOS:000300528500073 |
| 公开日期 | 2014-11-04 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/7840]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Li, Angzhen,Zhao, Xu,Hou, Yining,et al. The electrocatalytic dechlorination of chloroacetic acids at electrodeposited Pd/Fe-modified carbon paper electrode[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2012,111:628－635. |
| APA | Li, Angzhen,Zhao, Xu,Hou, Yining,Liu, Huijuan,Wu, Liyuan,&Qu, Jiuhui.(2012).The electrocatalytic dechlorination of chloroacetic acids at electrodeposited Pd/Fe-modified carbon paper electrode.APPLIED CATALYSIS B-ENVIRONMENTAL,111,628－635. |
| MLA | Li, Angzhen,et al."The electrocatalytic dechlorination of chloroacetic acids at electrodeposited Pd/Fe-modified carbon paper electrode".APPLIED CATALYSIS B-ENVIRONMENTAL 111(2012):628－635. |
入库方式： OAI收割
来源：生态环境研究中心
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