Biotechnological synthesis of Pd/Ag and Pd/Au nanoparticles for enhanced Suzuki-Miyaura cross-coupling activity.
Biotechnological synthesis of Pd/Ag and Pd/Au nanoparticles for enhanced Suzuki-Miyaura cross-coupling activity.
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DOI：
10.1111/1751-7915.13762
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发表时间：
2021-11
影响因子：
5.7
通讯作者：
Lloyd JR
中科院分区：
文献类型：
--
作者：
Kimber RL;Parmeggiani F;Neill TS;Merroun ML;Goodlet G;Powell NA;Turner NJ;Lloyd JR
双金属纳米粒子催化剂由于其独特的化学和物理性质而引起了人们的广泛关注。金属还原细菌产生高催化活性的纳米颗粒的能力是众所周知的;然而，用这些生物体合成的纳米颗粒的性质和催化活性还没有得到很好的理解。在这里，我们报告了在温和条件下使用金属还原细菌希瓦氏菌（Shewanella oneidensis）一锅法生物合成Pd/Ag（bio ‐ Pd/Ag）和Pd/Au（bio ‐ Pd/Au）纳米颗粒。使用扫描透射电子显微镜（STEM）进行的能量色散X射线分析揭示了生物合成纳米颗粒中两种金属（Pd/Ag或Pd/Au）的存在。X射线吸收近边光谱（XANES）表明，Pd（0）和Pd（II）在bio-Pd/Ag和bio-Pd/Au中均有显著贡献，其中Ag和Au主要以金属形式存在。扩展X射线吸收精细结构光谱（EXAFS）支持在bio-Pd/Ag和bio-Pd/Au中存在多种Pd物质，如从Pd-Pd、Pd-O和Pd-S壳推断的。与单金属Pd催化剂相比，bio-Pd/Ag和bio-Pd/Au都表现出对Suzuki-Miyaura交叉偶联的极大增强的催化活性，其中bio-Pd/Ag显著优于其他催化剂。该催化剂是非常通用的，容忍广泛的取代基。这项工作展示了一种绿色合成方法，新的纳米粒子，显示显着增强的催化活性相比，他们的monoclonal对应物。本文报道了生物技术合成的新型纳米粒子的铃木宫浦耦合显着增强的催化活性，相比，他们的monoclonal对应物。特别地，发现生物合成的Pd/Ag是非常通用的，耐受一系列取代基并以良好至优异的产率产生产物，包括药学相关的化合物。
Bimetallic nanoparticle catalysts have attracted considerable attention due to their unique chemical and physical properties. The ability of metal‐reducing bacteria to produce highly catalytically active monometallic nanoparticles is well known; however, the properties and catalytic activity of bimetallic nanoparticles synthesized with these organisms is not well understood. Here, we report the one‐pot biosynthesis of Pd/Ag (bio‐Pd/Ag) and Pd/Au (bio‐Pd/Au) nanoparticles using the metal‐reducing bacterium, Shewanella oneidensis, under mild conditions. Energy dispersive X‐ray analyses performed using scanning transmission electron microscopy (STEM) revealed the presence of both metals (Pd/Ag or Pd/Au) in the biosynthesized nanoparticles. X‐ray absorption near‐edge spectroscopy (XANES) suggested a significant contribution from Pd(0) and Pd(II) in both bio‐Pd/Ag and bio‐Pd/Au, with Ag and Au existing predominately as their metallic forms. Extended X‐ray absorption fine‐structure spectroscopy (EXAFS) supported the presence of multiple Pd species in bio‐Pd/Ag and bio‐Pd/Au, as inferred from Pd–Pd, Pd–O and Pd–S shells. Both bio‐Pd/Ag and bio‐Pd/Au demonstrated greatly enhanced catalytic activity towards Suzuki–Miyaura cross‐coupling compared to a monometallic Pd catalyst, with bio‐Pd/Ag significantly outperforming the others. The catalysts were very versatile, tolerating a wide range of substituents. This work demonstrates a green synthesis method for novel bimetallic nanoparticles that display significantly enhanced catalytic activity compared to their monometallic counterparts. This article reports the biotechnological synthesis of novel bimetallic nanoparticles which display significantly enhanced catalytic activity in Suzuki–Miyaura couplings, compared to their monometallic counterparts. In particular, the biosynthesised Pd/Ag was found to be very versatile, tolerating a range of substituents and generating products with a good to excellent yields, including pharmaceutically relevant compounds.
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影响因子：
5.1
作者：
De Windt, W;Aelterman, P;Verstraete, W
通讯作者：
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影响因子：
4.6
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影响因子：
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作者：
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作者：
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