A method for recycling the Pd catalyst at molar ppm level

IF 2 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Mechanical and Materials Engineering Pub Date : 2025-06-16 DOI:10.1186/s40712-025-00289-6

Shohei Masuu, Misaki Goto, Saki Miyamoto, Tomoya Kiguchi, Tsutomu Shinagawa, Yoshimasa Matsumura, Osamu Shimomura, Atsushi Ohtaka

{"title":"A method for recycling the Pd catalyst at molar ppm level","authors":"Shohei Masuu, Misaki Goto, Saki Miyamoto, Tomoya Kiguchi, Tsutomu Shinagawa, Yoshimasa Matsumura, Osamu Shimomura, Atsushi Ohtaka","doi":"10.1186/s40712-025-00289-6","DOIUrl":null,"url":null,"abstract":"<div><p>Herein, we describe the preparation of poly(tetrafluoroethylene) (PTFE) materials, including a PTFE-coated magnetic stir bar and a PTFE vial, for the recycling of catalysts at the molar ppm level. Metal nanoparticles were consistently deposited onto the PTFE surface using straightforward and conventional techniques for nanoparticle formation. These metal nanoparticles deposits proved resistant to removal by simple washing methods. Upon reducing Pd(OAc)<sub>2</sub> with 4-methylphenylboronic acid in a 1.5 mol/L aqueous KOH solution at 90 °C for 1 h, nanoparticles approximately 100 nm in size, along with larger aggregates, were observed via SEM analysis of the PTFE-coated magnetic stir bar (8.0 mm × 1.5 mm). The reusability of the Pd nanoparticles-immobilized stir bar was suboptimal in Hiyama and Suzuki coupling reactions. However, the stir bar on which metal nanoparticles were sequentially deposited (Pd, Rh, and Pd) exhibited high recyclability over ten consecutive runs. Additionally, the PTFE vial, upon deposition of both Pd and Rh, was employed as a highly recyclable catalyst.</p><h3>Graphical Abstract</h3>\n<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":592,"journal":{"name":"International Journal of Mechanical and Materials Engineering","volume":"20 1","pages":""},"PeriodicalIF":2.0000,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://jmsg.springeropen.com/counter/pdf/10.1186/s40712-025-00289-6","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Mechanical and Materials Engineering","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1186/s40712-025-00289-6","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Herein, we describe the preparation of poly(tetrafluoroethylene) (PTFE) materials, including a PTFE-coated magnetic stir bar and a PTFE vial, for the recycling of catalysts at the molar ppm level. Metal nanoparticles were consistently deposited onto the PTFE surface using straightforward and conventional techniques for nanoparticle formation. These metal nanoparticles deposits proved resistant to removal by simple washing methods. Upon reducing Pd(OAc)₂ with 4-methylphenylboronic acid in a 1.5 mol/L aqueous KOH solution at 90 °C for 1 h, nanoparticles approximately 100 nm in size, along with larger aggregates, were observed via SEM analysis of the PTFE-coated magnetic stir bar (8.0 mm × 1.5 mm). The reusability of the Pd nanoparticles-immobilized stir bar was suboptimal in Hiyama and Suzuki coupling reactions. However, the stir bar on which metal nanoparticles were sequentially deposited (Pd, Rh, and Pd) exhibited high recyclability over ten consecutive runs. Additionally, the PTFE vial, upon deposition of both Pd and Rh, was employed as a highly recyclable catalyst.

Graphical Abstract

查看原文本刊更多论文

一种以摩尔ppm水平回收Pd催化剂的方法

在这里，我们描述了聚四氟乙烯（PTFE）材料的制备，包括聚四氟乙烯涂层的磁性搅拌棒和聚四氟乙烯瓶，用于在摩尔ppm水平上回收催化剂。使用直接和传统的纳米颗粒形成技术，金属纳米颗粒始终沉积在PTFE表面。事实证明，这些金属纳米颗粒沉积物无法通过简单的洗涤方法去除。在1.5 mol/L KOH水溶液中，用4-甲基苯基硼酸在90℃下还原Pd(OAc)2 1小时后，通过扫描电镜对ptfe涂层磁性搅拌棒（8.0 mm × 1.5 mm）进行分析，观察到尺寸约为100 nm的纳米颗粒和较大的聚集体。在Hiyama和Suzuki偶联反应中，钯纳米颗粒-固定化搅拌棒的可重复使用性不佳。然而，连续沉积金属纳米颗粒（Pd， Rh和Pd）的搅拌棒在连续十次运行中表现出很高的可回收性。此外，聚四氟乙烯小瓶，在沉积Pd和Rh后，被用作高度可回收的催化剂。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊