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首页> 外文期刊>Chemical engineering journal >Preparation and characterization of palladium/polypyrrole/foam nickel electrode for electrocatalytic hydrodechlorination
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Preparation and characterization of palladium/polypyrrole/foam nickel electrode for electrocatalytic hydrodechlorination

机译：电催化加氢脱氯钯/聚吡咯/泡沫镍电极的制备与表征

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摘要

Palladium nanopartides electrolytic deposited onto preformed electrodes coated with polymer film was used as cathode for the electrocatalytic hydrodechlorination of dichlorophenol in aqueous solution. The surface of the electrode substrates was coated with a polypyrrole (PPY) film electropolymerized via potentiostatic method. The FT-IR results indicated that the peaks at 1550, 1190 and 960 cm~(-1) were ascribed to the characteristic bands of PPYs. SEM images performed that the Pd nano-particles were uniformly dispersed on the composite electrode after modification with PPYs. Moreover, the nucleation and growth of PPY in NaC104 was much faster than that of others from the chronoamperometry analysis. XRD and XPS results indicated that Pd existed mainly as Pd°. TEM results showed that Pd particles were well dispersed with an average diameter of 10 nm. The effects of the dopant ions, applied potential, temperature, and reaction time of potentiostatic electropolymerization on the composite electrode for the electrochemical hydrodechlorination of 2,4-dichlorophenol (2,4-DCP) were examined. Under optimal conditions, a 90.9% removal rate for 2,4-DCP could be achieved with the use of the Pd/PPY_(PTS)/Ni composite electrode. The process of 2,4-DCP dechlorination was investigated.
机译：电解沉积在预先涂有聚合物膜的预制电极上的纳米钯钯用作阴极，用于水溶液中二氯苯酚的电催化加氢脱氯。电极基板的表面涂覆有通过恒电位法电聚合的聚吡咯（PPY）膜。 FT-IR结果表明，在1550、1190和960 cm〜（-1）处的峰归因于PPYs的特征带。 SEM图像表明，在用PPYs改性后，Pd纳米颗粒均匀地分散在复合电极上。而且，通过计时电流分析法，NaC104中PPY的成核和生长要快得多。 XRD和XPS结果表明，Pd主要以Pd°的形式存在。 TEM结果表明，Pd颗粒分散均匀，平均直径为10nm。考察了掺杂离子，施加电势，温度和恒电位电聚合反应时间对复合电极上2,4-二氯苯酚（2,4-DCP）进行电化学加氢脱氯的影响。在最佳条件下，使用Pd / PPY_（PTS）/ Ni复合电极可实现2,4-DCP的90.9％去除率。研究了2,4-DCP脱氯的过程。

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