Palladium/carbon nanotubes-nafion film-modified titanium mesh electrode (Pd/CNTs-nafion film/Ti electrode) was prepared and used for catalytic dechlorination of 2,3,5-trichlorophenol (2,3,5-TCP). The influences of factors, such as Pd2+ concentration, plating solution pH, and electrodeposition time and current, on the preparation of the electrode were studied by cyclic voltammetry (CV) to establish the optimal electrode preparation conditions. Additionally, the CV results highlighted that the addition of the CNTs-nafion film could enhance the electrochemical performance of the electrode. The Pd/CNTs-nafion film/Ti electrode was characterized by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), and inductively coupled plasma-atomic emission spectrometry (ICP-AES). The electrode exhibited good stability and high catalytic dechlorination capacity on 2,3,5-TCP-100 mg L-1 2,3,5-TCP was completely dechlorinated within 100 min at a dechlorination current of 5 mA and an initial solution pH of 2.3. High-performance liquid chromatography (HPLC) was used to detect the chlorinated phenolic intermediates, and the results revealed that the final products were mainly phenol. The kinetics studies revealed that the dechlorination of 2,3,5-TCP followed two-stage mixed order kinetics, and a possible degradation pathway for 2,3,5-TCP was proposed.

中文翻译：

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2,3,5-三氯苯酚在钯/碳纳米管-nafion膜/钛网电极上的电催化脱氯。

制备了钯/碳纳米管-nafion膜修饰的钛网电极（Pd / CNTs-nafion膜/ Ti电极），并将其用于2,3,5-三氯苯酚（2,3,5-TCP）的催化脱氯。通过循环伏安法研究了Pd2 +浓度，电镀液pH值，电沉积时间和电流等因素对电极制备的影响，建立了最佳的电极制备条件。此外，CV结果突出表明添加CNTs-nafion膜可以增强电极的电化学性能。通过场发射扫描电子显微镜（FESEM），X射线衍射（XRD）和电感耦合等离子体原子发射光谱（ICP-AES）对Pd / CNTs-nafion膜/ Ti电极进行了表征。该电极在2,3,5-TCP-100 mg L-1上显示出良好的稳定性和高催化脱氯能力，在5分钟的脱氯电流和初始溶液pH值为100的情况下，在100分钟内将2,3,5-TCP完全脱氯。 2.3。高效液相色谱法（HPLC）检测氯代酚醛中间体，结果表明最终产物主要为苯酚。动力学研究表明，2,3,5-TCP的脱氯遵循两阶段混合阶动力学，并提出了2,3,5-TCP可能的降解途径。结果表明，最终产物主要为苯酚。动力学研究表明，2,3,5-TCP的脱氯遵循两阶段混合阶动力学，并提出了2,3,5-TCP可能的降解途径。结果表明，最终产物主要为苯酚。动力学研究表明，2,3,5-TCP的脱氯遵循两阶段混合阶动力学，并提出了2,3,5-TCP可能的降解途径。