A nanoparticulate polyacetylene-supported Pd(II) catalyst combining the advantages of homogeneous and heterogeneous catalysts

李欢,; 陈光需,; Duchesne, Paul N.; 张鹏,; 代燕,; 杨华艳,; 吴炳辉,; 刘圣洁,; 许潮发,; 郑南峰,

doi:10.1016/s1872-2067(15)60930-5

Cited by 9 publications

(6 citation statements)

References 50 publications

(28 reference statements)

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“…相比之下, 多相催化剂虽然便于回收利用, 但是其分散性往往不好, 在液相体系中容易聚集和沉降, 从而导致催化活性较低 [3] . 为了结合均相与多相催化剂的优势, 均相催化剂的多相化与多相催化剂的均相化都引起了广泛的研究兴趣 [4][5][6] .…”

Section: 引言unclassified

Microwave-Assisted Synthesis and Photocatalytic Performance of a Soluble Porphyrinic MOF

Wu¹,

Zhang²,

Sun³

et al. 2020

Acta Chim. Sinica

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Metal-organic frameworks (MOFs), a class of promising heterogeneous catalysts, though readily recyclable, usually suffer from poor dispersity and ease of sedimentation in liquid-phase reaction systems, which may lead to limited exposure of active sites and unsatisfied activity. Conventional hydrothermal synthesis often results in large MOF particles in bulk form and poor dispersity. The homogenization of MOF catalysts is an exciting but challenging task to integrate the advantages of both homogeneous and heterogeneous catalysts. Herein, by means of microwave-assisted synthetic approach, a soluble porphyrinic MOF, denoted as S-Al-PMOF, has been successfully fabricated. In contrast to the Bulk-Al-PMOF synthesized by the conventional hydrothermal route, which requires 180 ℃ and 16 h, the S-Al-PMOF obtained by the microwave-assisted method is very efficient and takes 30 min only at 140 ℃. While the as-synthesized S-Al-PMOF can be completely soluble in acetonitrile by ultrasonic dispersion to give a clear and transparent colloidal solution, the Bulk-Al-PMOF can form a turbid suspension liquid by continuous stirring, which easily aggregate with sedimentation in a short time after standing. Furthermore, the S-Al-PMOF can be easily separated from the solution by suction filtration and then re-dissolved in acetonitrile. This separation and re-dissolution process can be repeated several times to prove its good recovery and recycling. Given the outstanding light harvesting ability of Al-PMOF, photocatalytic H 2 production by water splitting has been adopted to examine the activity of both S-Al-PMOF and Bulk-Al-PMOF. As a result, the activity of S-Al-PMOF is around 14 times higher than that of Bulk-Al-PMOF, owing to excellent solubility of the former. Moreover, S-Al-PMOF also exhibits good recyclability in the consecutive three cycles of reaction. We believe that the successful synthesis of soluble Al-PMOF opens a new avenue to the homogenization of heterogeneous catalysts.

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Section: 引言unclassified

Microwave-Assisted Synthesis and Photocatalytic Performance of a Soluble Porphyrinic MOF

Wu¹,

Zhang²,

Sun³

et al. 2020

Acta Chim. Sinica

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“…In an excellent research work, Li et al reported a facile strategy to produce a novel nanoparticulate polyacetylene-supported Pd(II) catalyst [NP-Pd(II)] for use in the aqueous Suzuki-Miyaura cross-coupling reaction, by simply treating an aqueous solution of PdCl 4 2− with acetylene under ambient conditions. The nanocomposites reveal homogeneous distribution of the Pd(II) along the polyacetylene and the aggregation of the NP-Pd(II) with diameters of 2-3 nm that make this nanocomposite an ideal catalyst combining the advantages of both homogeneous and heterogeneous catalysts [143]. Sapurina et al recently reported that polypyrrole nanotubes, prepared by chemical reaction in the presence of methyl orange, could be used as a conducting substrate for the deposition of noble-metal nanoparticles.…”

Section: Palladium Nanoparticles-polymermentioning

confidence: 99%

Recent progress in nanocomposites based on conducting polymer: application as electrochemical sensors

et al. 2018

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Over the years, intensive research works have been devoted to conducting polymers due to their potential application in many fields such as fuel cell, sensors, and capacitors. To improve the properties of these compounds, several new approaches have been developed which consist in combining conducting polymers and nanoparticles. Then, this review intends to give a clear overview on nanocomposites based on conducting polymers, synthesis, characterization, and their application as electrochemical sensors. For this, the paper is divided into two parts: the first part will highlight the nanocomposites synthesized by combination of carbon nanomaterials (CNMs) and conducting polymers. The preparation of polymer/CNMs such as graphene and carbon nanotube modified electrode is presented coupled with relevant applications. The second part consists of a review of nanocomposites synthesized by combination of metal nanoparticles and conducting polymers.

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“…We recently showed that treating the Pd NPs with acetylene yielded a polyacetylene coated, hydrophobic Pd catalyst which performed distinctly better than commercial Pd/C . What is interesting is that when Pd(II) complex was used instead of Pd NPs, a polyacetylene supported Pd(II) complex formed which efficiently catalyzed aqueous Suzuki coupling ,. These preliminary results showed an intriguing prospect of acetylene in fabrication of nanocatalysts with novel properties.…”

Section: Introductionmentioning

confidence: 97%

Acetylene‐Mediated Synthesis of Supported Pt Nanocatalyst for Selective Hydrogenation of Halonitrobenzene

et al. 2018

ChemNanoMat

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We demonstrated that acetylene was a unique reducing agent for aqueous synthesis of ultrasmall Pt nanoparticles (NPs) supported on carbon nanotube (CNT) with high stability. Multiple techniques including X‐ray absorption fine structure (XAFS) were employed to fully characterize this Pt catalyst. The in‐situ generated olefins from acetylene closely wrapped the Pt NPs, and turned into a very thin carbon shell in the subsequent calcination step. The carbon shell not only endowed the Pt NPs with extraordinary thermal stability, but also significantly improved the catalytic selectivity in hydrogenation of halogenated nitrobenzene by eliminating the dehalogenation reaction. Also, the acetylene‐mediated preparation method is readily scalable due to its convenience and environmental friendliness.

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A nanoparticulate polyacetylene-supported Pd(II) catalyst combining the advantages of homogeneous and heterogeneous catalysts

Cited by 9 publications

References 50 publications

Microwave-Assisted Synthesis and Photocatalytic Performance of a Soluble Porphyrinic MOF

Microwave-Assisted Synthesis and Photocatalytic Performance of a Soluble Porphyrinic MOF

Recent progress in nanocomposites based on conducting polymer: application as electrochemical sensors

Acetylene‐Mediated Synthesis of Supported Pt Nanocatalyst for Selective Hydrogenation of Halonitrobenzene

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