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首页> 外文期刊>Advanced Functional Materials >Palladium Nanoparticles Supported on Magnetic Carbon-Coated Cobalt Nanobeads: Highly Active and Recyclable Catalysts for Alkene Hydrogenation
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Palladium Nanoparticles Supported on Magnetic Carbon-Coated Cobalt Nanobeads: Highly Active and Recyclable Catalysts for Alkene Hydrogenation

机译：磁性碳包覆钴纳米珠上负载的钯纳米颗粒：烯烃加氢的高活性和可回收催化剂

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摘要

Palladium nanoparticles are deposited on the surface of highly magnetic carbon-coated cobalt nanoparticles. in contrast to the established synthesis of Pd nanoparticles via reduction of Pd(Ⅱ) precursors, the microwave decomposition of a Pd(0) source leads to a more efficient Pd deposition, resulting in a material with considerably higher activity in the hydrogenation of alkenes. Systematic variation of the Pd loading on the carbon-coated cobalt nano-particle surface reveals a distinct trend to higher activities with decreased loading of Pd. The activity of the catalyst is further improved by the addition of 10 vol% Et_2O to iso-propanol that is found to be the solvent of choice. With respect to activity (turnover frequencies up to 11 095 h~(-1)), handling, recycla-bility through magnetic decantation, and leaching of Pd (≤6 ppm/cycle), this novel magnetic hybrid material compares favorably to conventional Pd/C or Pd@CNT catalysts.
机译：钯纳米颗粒沉积在高磁性碳涂层钴纳米颗粒的表面上。与已建立的通过还原Pd（Ⅱ）前体来合成Pd纳米粒子相反，Pd（0）源的微波分解导致更有效的Pd沉积，从而导致烯烃加氢活性高得多的材料。碳包覆的钴纳米粒子表面上Pd负载的系统变化显示出明显的趋势，即随着Pd负载的减少，活性更高。通过将10体积％的Et_2O添加到异丙醇中进一步提高了催化剂的活性，发现异丙醇是选择的溶剂。在活性（周转频率高达11095 h〜（-1）），处理，通过磁倾析和Pd浸出（≤6ppm /循环）的可回收性方面，这种新型的磁性杂化材料与常规Pd相比具有优势/ C或Pd @ CNT催化剂。

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  • 来源
    《Advanced Functional Materials》 |2014年第14期|2020-2027|共8页
  • 作者

    Quirin M. Kainz; Roland Linhardt; Robert N. Grass; Gianvito Vile; Javier Perez-Ramirez; Wendelin J. Stark; Oliver Reiser;

  • 作者单位

    Institute of Organic Chemistry University of Regensburg Universitaetsstr. 31, 93053, Regensburg, Germany;

    Institute of Organic Chemistry University of Regensburg Universitaetsstr. 31, 93053, Regensburg, Germany;

    Institute for Chemical and Bioengineering ETH Zurich, Wolfgang-Pauli-Str. 10, 8093, Zuerich, Switzerland;

    Institute for Chemical and Bioengineering ETH Zurich, Wolfgang-Pauli-Str. 10, 8093, Zuerich, Switzerland;

    Institute for Chemical and Bioengineering ETH Zurich, Wolfgang-Pauli-Str. 10, 8093, Zuerich, Switzerland;

    Institute for Chemical and Bioengineering ETH Zurich, Wolfgang-Pauli-Str. 10, 8093, Zuerich, Switzerland;

    Institute of Organic Chemistry University of Regensburg Universitaetsstr. 31, 93053, Regensburg, Germany;

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