Performance and mechanism of palladium-based binary nanowires for electrocatalytic removal of halogenated PPCPs

IF 5.7 2区 材料科学 Q2 CHEMISTRY, PHYSICAL Surfaces and Interfaces Pub Date : 2025-03-08 DOI:10.1016/j.surfin.2025.106188
Junjing Li , Xu Liu , Zilin Tan , Liang Wang
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Abstract

In order to enhance the catalytic activity of Pd nanoparticles and reduce the amount of Pd, the present study was carried out to construct nanowire structures by surfactant-directed hydration method to further increase the active sites on the surface of Pd and improve the yield of atomic hydrogen (H). The introduction of cheap metal Ni effectively reduced the Pd dosage and increased the utilization of Pd. Nitrogen-doped ordered mesoporous carbon (NOMC) was incorporated to facilitate the dispersion of Pd particles and improve the stability of the catalyst while ensuring the catalytic activity. The prepared palladium-nickel nanowires/nitrogen-doped ordered mesoporous carbon/carbon (Pd-Ni NWs/NOMC/C) electrodes showed excellent efficiency for the removal of halogenated pharmaceuticals and personal care products (PPCPs). The combination of palladium-nickel nanowires (Pd-Ni NWs) with NOMC enhanced the electron transfer capability at the electrode surface and improved the H yield. The results showed that the removal efficiency of this electrode for lornoxicam reached 97.2 % at 270 min. The electrode reduced the amount of Pd while stabilizing the electrocatalytic effect. The dechlorination mechanism of Pd-Ni NWs/NOMC/C electrode for lornoxicam was also proposed, and the reaction products and their toxicity were analyzed. This study provided a new idea for designing and synthesizing metal composite catalysts, reduced the cost of catalyst preparation, and had a good application prospect in the treatment of wastewater containing halogenated organic compounds.

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为了提高钯纳米颗粒的催化活性,减少钯的用量,本研究采用表面活性剂引导的水合方法构建了纳米线结构,进一步增加了钯表面的活性位点,提高了原子氢(H⁎)的产率。廉价金属镍的引入有效减少了钯的用量,提高了钯的利用率。氮掺杂有序介孔碳(NOMC)的加入促进了钯颗粒的分散,提高了催化剂的稳定性,同时保证了催化活性。制备的钯镍纳米线/掺氮有序介孔碳(Pd-Ni NWs/NOMC/C)电极在去除卤代药物和个人护理产品(PPCPs)方面表现出卓越的效率。钯镍纳米线(Pd-Ni NWs)与 NOMC 的结合增强了电极表面的电子传递能力,提高了 H⁎ 的产量。结果表明,该电极在 270 分钟内对洛诺昔康的去除率达到 97.2%。该电极减少了钯的用量,同时稳定了电催化效果。此外,还提出了 Pd-Ni NWs/NOMC/C 电极对洛诺昔康的脱氯机理,并分析了反应产物及其毒性。该研究为设计和合成金属复合催化剂提供了新思路,降低了催化剂制备成本,在含卤代有机化合物废水处理中具有良好的应用前景。
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来源期刊
Surfaces and Interfaces
Surfaces and Interfaces Chemistry-General Chemistry
CiteScore
8.50
自引率
6.50%
发文量
753
审稿时长
35 days
期刊介绍: The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)
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