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首页> 外文期刊>Journal of Hazardous Materials >Electrodeposition of palladium and reduced graphene oxide nanocomposites on foam-nickel electrode for electrocatalytic hydrodechlorination of 4-chlorophenol
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Electrodeposition of palladium and reduced graphene oxide nanocomposites on foam-nickel electrode for electrocatalytic hydrodechlorination of 4-chlorophenol

机译：泡沫镍电极上钯和还原氧化石墨烯纳米复合材料的电沉积，用于4-氯苯酚的电催化加氢脱氯

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摘要

A high-performance palladium (Pd) and reduced graphene oxide (RGO) composite electrode was prepared on foam-nickel (foam-Ni) via two-step electrodeposition processes. The scanning electron microscopic (SEM) observation showed that the obtained Pd/RGO/foam-Ni composite electrode displayed a uniform and compact morphology. The X-ray diffraction (XRD) and X-ray photoelectron spectroscopic (XPS) analysis confirmed the successful deposition of Pd and RGO on nickel substrate. The cyclic voltammetric (CV) measurements indicated that the presence of RGO greatly enhanced the active surface area of Pd particles deposited on foam-Ni. The as-deposited Pd/RGO/foam-Ni electrode was applied to electrocatalytic hydrodechlorination (ECU) of 4-chlorophenol (4-CP). Various factors influencing the dechlorination of 4-CP such as dechlorination current, initial concentration of 4-CP, Na2SO4 concentration and initial pH were systematically investigated. The thermodynamic analysis showed that the dechlorination reaction of 4-CP at different temperatures followed the first-order kinetics and the activation energy for 4-CP dechlorination on Pd/RGO/foam-Ni electrode was calculated to be 51.96 kJ mol(-1). Under the optimum conditions, the dechlorination efficiency of 4-CP could reach 100% after 60-min ECU treatment. Moreover, the prepared Pd/RGO/foam-Ni composite electrode showed good stability for recycling utilization in ECU of 4-CP. (C) 2015 Elsevier B.V. All rights reserved.
机译：通过两步电沉积工艺，在泡沫镍（泡沫镍）上制备了高性能钯（Pd）和氧化石墨烯（RGO）复合电极。扫描电镜（SEM）观察表明，所得的Pd / RGO /泡沫-Ni复合电极显示出均匀且致密的形态。 X射线衍射（XRD）和X射线光电子能谱（XPS）分析证实了Pd和RGO在镍基体上的成功沉积。循环伏安法（CV）测量表明，RGO的存在极大地增加了沉积在泡沫镍上的Pd颗粒的活性表面积。将沉积的Pd / RGO /泡沫镍电极应用于4-氯苯酚（4-CP）的电催化加氢脱氯（ECU）。系统地研究了影响4-CP脱氯的各种因素，如脱氯电流，4-CP的初始浓度，Na2SO4浓度和初始pH。热力学分析表明，在不同温度下4-CP的脱氯反应遵循一级动力学，Pd / RGO /泡沫-Ni电极上4-CP的脱氯活化能经计算为51.96 kJ mol（-1） 。在最佳条件下，ECU处理60分钟后4-CP的脱氯效率可达到100％。而且，制备的Pd / RGO /泡沫-Ni复合电极在4-CP的ECU中显示出良好的循环利用稳定性。 （C）2015 Elsevier B.V.保留所有权利。

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  • 来源
    《Journal of Hazardous Materials》 |2015年第15期|1-8|共8页
  • 作者

    Liu Yong; Liu Lan; Shan Jun; Zhang Jingdong;

  • 作者单位

    Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Key Lab Large Format Battery Mat & Syst, Minist Educ, Wuhan 430074, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Key Lab Large Format Battery Mat & Syst, Minist Educ, Wuhan 430074, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Key Lab Large Format Battery Mat & Syst, Minist Educ, Wuhan 430074, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Key Lab Large Format Battery Mat & Syst, Minist Educ, Wuhan 430074, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Palladium nanoparticles; Reduced graphene oxide; 4-Chlorophenol; Electrodeposition; Electrocatalytic hydrodechlorination;

    机译：钯纳米粒子;还原氧化石墨烯;4-氯苯酚;电沉积;电催化加氢脱氯;

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