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首页> 外文期刊>RSC Advances >Modification of a Pd-loaded electrode with a carbon nanotubes–polypyrrole interlayer and its dechlorination performance for 2,3-dichlorophenol
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Modification of a Pd-loaded electrode with a carbon nanotubes–polypyrrole interlayer and its dechlorination performance for 2,3-dichlorophenol

机译：碳纳米管-聚吡咯中间层负载钯电极的修饰及其对2,3-二氯苯酚的脱氯性能

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摘要

A novel Pd loaded Ti electrode was prepared with a carbon nanotubes and polypyrrole interlayer modification, referred to as a Pd/CNTs–PPy/Ti electrode. Pretreated CNTs were deposited on the substrate uniformly by electrophoretic deposition technique. Modification by the CNTs–PPy interlayer made the Pd particles smaller and well-distributed. Pulsed-current electrodeposition technique led to more compact Pd particles. The hydrogen adsorption current value increased 55.3% and the electrochemical active surface area (EASA) increased 58.7% compared to the electrode without modification. The prepared Pd/CNTs–PPy/Ti electrode was employed in dechlorination of 2,3-dichlorophenol (2,3-DCP) in aqueous solution. The potential impact factors on the electrocatalytic dechlorination were studied, including dechlorination current, initial pH value of catholyte, reaction temperature and common ions in aqueous solution. Complete dechlorination could be achieved within 70 min under the selected conditions i.e., current of 5 mA, and an initial pH of 2.5 at ambient temperature. The common ions in aqueous solution, such as NO3?, CO32?, HCO3?, Mg2+, K+ and Ca2+, had no obvious effect on the electrocatalytic dechlorination within the scope of this investigation. The prepared Pd/CNTs–PPy/Ti electrode exhibited promising dechlorination potential with higher electrochemical activity.
机译：用碳纳米管和聚吡咯层间修饰制备了一种新型的Pd负载Ti电极，称为Pd / CNTs-PPy / Ti电极。通过电泳沉积技术将预处理的CNT均匀沉积在基板上。 CNTs-PPy中间层的改性使Pd颗粒更小且分布均匀。脉冲电流电沉积技术可产生更致密的Pd颗粒。与未改性的电极相比，氢吸附电流值增加了55.3％，电化学活性表面积（EASA）增加了58.7％。制备的Pd / CNTs-PPy / Ti电极用于水溶液中的2,3-二氯苯酚（2,3-DCP）的脱氯。研究了对电催化脱氯的潜在影响因素，包括脱氯电流，阴极电解液的初始pH值，反应温度和水溶液中的离子。在选定的条件下，即电流为5 mA，环境温度为初始pH值为2.5时，可以在70分钟内完成完全脱氯。水溶液中的常见离子，例如NO 3 ？ ，CO 3 < / sub> 2？ ，HCO 3 ？ ，Mg 2 + ，K + 和Ca 2+ ，在本研究范围内对电催化脱氯没有明显影响。制备的Pd / CNTs-PPy / Ti电极具有良好的脱氯潜力，具有较高的电化学活性。

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