| Pd/Al2O3粒子电极电催化还原BrO3-的研究 |
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| 引用本文： | 童雅婷,冒冉,安晓强,李一兵,李建斐,姜鹏,许文泽,兰华春.Pd/Al2O3粒子电极电催化还原BrO3-的研究[J].环境科学学报,2016,36(8):2869-2875. |
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| 作者姓名： | 童雅婷 冒冉 安晓强 李一兵 李建斐 姜鹏 许文泽 兰华春 |
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| 作者单位： | 1. 河北工业大学土木工程学院, 天津 300401;2. 中国科学院生态环境研究中心, 中国科学院饮用水科学与技术重点实验室, 北京 100085,中国科学院生态环境研究中心, 中国科学院饮用水科学与技术重点实验室, 北京 100085,中国科学院生态环境研究中心, 中国科学院饮用水科学与技术重点实验室, 北京 100085,河北工业大学土木工程学院, 天津 300401,河北工业大学土木工程学院, 天津 300401,河北工业大学土木工程学院, 天津 300401,河北工业大学土木工程学院, 天津 300401,中国科学院生态环境研究中心, 中国科学院饮用水科学与技术重点实验室, 北京 100085 |
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| 基金项目： | 国家自然科学基金（No.51478455） |
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| 摘 要： | 针对常规方法难以去除水中Br_3~-的问题,采用浸渍煅烧法制备了负载型纳米Pd/Al_2O_3粒子电极,研究了该电极电催化还原Br O-3的效果.催化剂的结构表征表明该反应实现了Pd纳米晶的均匀负载,纳米Pd/Al_2O_3具有较高的电催化活性和较低的能耗,其最佳反应条件为3%Pd负载量,0.9 m A·cm-2电流密度和1 g·L催化剂投量,酸性条件可促进Br O-3的直接或间接还原.ESR检测证实了Pd的负载增强了反应体系活性物种H]的生成,进而促进了Br O-3的间接电催化还原.
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| 关 键 词： | 电催化还原 粒子电极 Br3-去除 原子氢 纳米Pd/Al2O3 |
| 收稿时间： | 2015/10/21 0:00:00 |
| 修稿时间： | 2015/11/20 0:00:00 |
The study of Pd/Al2O3 particle electrodes for electrochemical reduction of bromate |
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| TONG Yating,MAO Ran,AN Xiaoqiang,LI Yibing,LI Jianfei,JIANG Peng,XU Wenze and LAN Huachun.The study of Pd/Al2O3 particle electrodes for electrochemical reduction of bromate[J].Acta Scientiae Circumstantiae,2016,36(8):2869-2875. |
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| Authors: | TONG Yating MAO Ran AN Xiaoqiang LI Yibing LI Jianfei JIANG Peng XU Wenze and LAN Huachun |
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| Institution: | 1. College of Civil Engineering, Hebei University of Technology, Tianjin 300401;2. Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085,Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085,Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085,College of Civil Engineering, Hebei University of Technology, Tianjin 300401,College of Civil Engineering, Hebei University of Technology, Tianjin 300401,College of Civil Engineering, Hebei University of Technology, Tianjin 300401,College of Civil Engineering, Hebei University of Technology, Tianjin 300401 and Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085 |
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| Abstract: | The conventional water treatment strategies face the challenge to remove harmful BrO3- from drinking water. Here, Pd/Al2O3 particle electrodes were synthesized via an impregnation and calcination method. The potential application of particle electrodes in the electrocatalytic reduction of BrO3- was studied. The structural characterization results of catalysts confirme the uniform distribution of Pd nanocrystals, which resulted in the superior catalytic efficiency and low energy consumption. The optimal conditions for the reduction was determined to be 3% Pd loading, 0.9 mA·cm-2 current density and 1 g·L-1 catalyst dosage. Both of direct and indirect reduction could be facilitated by decreasing solution pH. The reactive species and possible electrocatalytic mechanism were further investigated. The ESR spin trapping result demonstrates the enhanced production of atomicH] in the presence of Pd, which contributed to the significantly improved electrocatalytic reduction of BrO3-. |
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| Keywords: | electrocatalytic reduction particle electrodes bromate atomic hydrogen nano-Pd/Al2O3 |
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