Electrochemical Reduction of Bromate by a Pd Modified Carbon Fiber Electrode: Kinetics and Mechanism
文献类型：期刊论文
| 作者 | Mao, Ran ; Zhao, Xu ; Qu, Jiuhui |
| 刊名 | ELECTROCHIMICA ACTA
 |
| 出版日期 | 2014 |
| 卷号 | 132期号:1页码:151-157 |
| 关键词 | Electro-reduction bromate removal Pd/C electrode |
| ISSN号 | 0013-4686 |
| 中文摘要 | The electroreduction of bromate (BrO3-) was investigated at a Pd modified carbon fiber (Pd/C) electrode prepared from PdCl2 via electrodeposition method. Pd particles distributed on the carbon fiber substrate uniformly. Under various cathode potentials, electroreduction removal of BrO3- at pure carbon fiber electrode and the Pd/C electrode were firstly compared. It was observed that nearly no BrO3- removal was observed within the bias potential of -2.0V at the carbon fiber electrode. At the Pd/C electrode, the removal efficiency of BrO3- was sharply increased from 24.0% to 58.4% at the cathode potential of -1.0 to -1.5 V, which was further increased to be 87.2% at -2.0 V. The electrochemical reduction of BrO3- was strongly pH-dependent at -0.5 V and the reduction rate could be enhanced at low pH. While at the potential of -2.0 V, a slight pH effect was observed. BrO3- electroreduction follows pseudo first-order kinetics; the rate constant k was firstly increased from 0.016 to 0.031 min(-1) with the increase of the Pd loading amount from 0.31 to 0.73 mg/cm(2), and then was decreased to 0.018 min(-1) at a higher Pd loading amount of 1.05 mg/cm(2). The Pd(0) nanoparticles played a significant role in forming atomic H* to realize indirect BrO3- reduction. The electrochemical reduction of BrO3- produces accumulated intermediates of HOBr and OBr-, which were subsequently reduced to Br- with the time evolution. (C) 2014 Elsevier Ltd. All rights reserved. |
| WOS记录号 | WOS:000337209600021 |
| 公开日期 | 2015-03-26 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/9685]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 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 | Mao, Ran,Zhao, Xu,Qu, Jiuhui. Electrochemical Reduction of Bromate by a Pd Modified Carbon Fiber Electrode: Kinetics and Mechanism[J]. ELECTROCHIMICA ACTA,2014,132(1):151-157. |
| APA | Mao, Ran,Zhao, Xu,&Qu, Jiuhui.(2014).Electrochemical Reduction of Bromate by a Pd Modified Carbon Fiber Electrode: Kinetics and Mechanism.ELECTROCHIMICA ACTA,132(1),151-157. |
| MLA | Mao, Ran,et al."Electrochemical Reduction of Bromate by a Pd Modified Carbon Fiber Electrode: Kinetics and Mechanism".ELECTROCHIMICA ACTA 132.1(2014):151-157. |
入库方式： OAI收割
来源：生态环境研究中心
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