Palladium Nanoparticles Supported on Magnetic CarbonCoated Cobalt Nanobeads: Highly Active and Recyclable Catalysts for Alkene Hydrogenation
Palladium Nanoparticles Supported on Magnetic CarbonCoated Cobalt Nanobeads: Highly Active and Recyclable Catalysts for Alkene Hydrogenation
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DOI：
10.1002/adfm.201303277
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发表时间：
2014-04-01
影响因子：
19
通讯作者：
Reiser, Oliver
中科院分区：
文献类型：
--
作者：
Kainz, Quirin M.;Linhardt, Roland;Reiser, Oliver
钯纳米颗粒沉积在高磁性碳包覆的钴纳米颗粒的表面上。与已建立的通过还原Pd（II）前体合成Pd纳米颗粒相反，Pd（0）源的微波分解导致更有效的Pd沉积，导致在烯烃氢化中具有相当高活性的材料。在碳包覆的钴纳米颗粒表面上的Pd负载的系统变化揭示了随着Pd负载的降低而具有更高活性的明显趋势。通过向异丙醇中加入10体积%的Et 2 O进一步提高了催化剂的活性，发现异丙醇是选择的溶剂。关于活性（周转频率高达11095 h（-1））、处理、通过磁倾析的可再循环性和Pd的浸出（6ppm/循环），这种新型磁性混合材料与常规Pd/C或Pd@CNT催化剂相比是有利的。
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 nanoparticle 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% Et2O 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, recyclability 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.