Effect of Polymers on the Formation of Nanosized Palladium Catalysts and Their Activity and Selectivity in the Hydrogenation of Acetylenic Alcohols

Жармагамбетова, А. К.; Zamanbekova, A. T.; Darmenbayeva, A. S.; Auyezkhanova, A. S.; Jumekeyeva, A. I.; Talgatov, E. T.

doi:10.1007/s11237-017-9524-8

Cited by 5 publications

(5 citation statements)

References 10 publications

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“…The study of mono-and bimetallic catalysts by transmission electron microscopy (TEM) showed the formation of palladium and silver nanoparticles of 1-3 nm evenly distributed on the surface of PAM-modified zinc oxide (Fig. 4) [21,22].…”

Section: Characterization Of Catalystsmentioning

confidence: 99%

“…On the other hand, stabilizing metal ions with water-soluble polymers has previously been shown to be an effective approach to improve the characteristics of supported catalysts used for hydrogenation of acetylene compounds [21,22]. Among the polymers used for preparation of supported metal catalysts, renewable and biodegradable natural polysaccharides have recently attracted increasing attention due to their enhanced biosafety, availability, and ability to stabilize metal nanoparticles [23,24].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of polymer protected Pd–Ag/ZnO catalysts for phenylacetylene hydrogenation

et al. 2022

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A simple and environmentally friendly method, based on sequential adsorption of polyacrylamide (PAM) and transition metal ions (Pd 2+ , Ag + ) on zinc oxide precipitated from water solution, was used to synthesize supported mono-and bimetallic catalysts with various Pd:Ag ratios. The catalyst characterization results indicated that PAM and metal ions are completely adsorbed by zinc oxide, forming polymer-stabilized Pd and Ag nanoparticles of 1-3 nm in size, evenly distributed on the support surface. The catalysts were studied in the hydrogenation of phenylacetylene under mild conditions (0.1 MPa, 40°C). Although Ag-free 1%Pd-PAM/ZnO catalyst presents an interesting catalytic performance (in terms of activity and selectivity), the optimal catalyst was 1%Pd-Ag(3:1)-PAM/ZnO, presenting a selectivity to styrene of 88% at 85.4% conversion of phenylacetylene. For comparison, similar Pd-Ag (3:1) bimetallic catalysts modified with polysaccharides such as pectin (Pec), chitosan (Chit) and 2-hydroxyethylcellulose (HEC) were studied in the hydrogenation process. The catalysts demonstrated nearly the same selectivity to styrene. The activity of the catalysts decreases in the following order: 1%Pd-Ag(3:1)-HEC/ZnO > 1%Pd-Ag(3:1)-PAM/ZnO > 1%Pd-Ag(3:1)-Pec/ZnO > 1%Pd-Ag(3:1)-Chit/ZnO.

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Section: Characterization Of Catalystsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of polymer protected Pd–Ag/ZnO catalysts for phenylacetylene hydrogenation

et al. 2022

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“…The ending groups of PEO, i.e., –OH groups, have effective chelation capability with transition metal species. Also, PEO is known as an effective stabilizer for transition metal nanoparticles in reducing of their agglomeration to form big-sized particles [24,25]. PEO itself has been used as a polymer support for Pd catalysts in Heck reactions [26,27,28].…”

Section: Introductionmentioning

confidence: 99%

Modification of Montmorillonite with Polyethylene Oxide and Its Use as Support for Pd0 Nanoparticle Catalysts

et al. 2019

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In this study, montmorillonite (MMT) was modified by intercalating polyethylene oxide (PEO) macromolecules between the interlayer spaces in an MMT-water suspension system. X-ray diffraction results revealed that the galleries of MMT were expanded significantly after intercalation of different loading of PEO. MMT/PEO 80/20 composite was chosen as the support platform for immobilization of Pd species in preparing novel heterogeneous catalysts. After immobilization of Pd species, the interlayer spacing of MMT/PEO (80/20) (1.52 nm) was further increased to 1.72 nm (Pd2+@MMT/PEO) and 1.73 nm (Pd0@MMT/PEO), confirming the well-immobilization of the Pd species in the interlayer spaces of PEO-modified MMT. High-resolution transmission electron microscopy (HR-TEM) observation results confirmed that Pd nanoparticles were confined inside the interlayer space of MMT and/or dispersed well on the outer surface of MMT. The conversion of Pd2+ to Pd0 species was evidenced by binding energy characterization with X-ray photo electron spectroscopy (XPS). The microstructure variation caused by the Pd immobilization was sensitively detected by positron annihilation lifetime spectroscopy (PALS) studies. The prepared Pd0@MMT/PEO (0.2/80/20) catalytic composite exhibits good thermal stability up to around 200 °C, and it showed high activities for Heck reactions between aryl iodides and butyl acrylates and could be recycled for five times. The correlations between the microstructure and properties of the Pd@MMT/PEO catalytic composites were discussed.

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“…Polymers with different functional groups are used as one of the nanotechnology approach to synthesize metal nanoparticles and catalysts [10][11][12][13][14][15] We have developed a simple method of catalyst preparation based on interaction and stabilization of metal nanoparticles by polymers on the surface of inorganic sorbents (natural and synthetic zeolites, metal oxides) [16,17]. The developed technique allows to obtain catalysts for selective hydrogenation of wide range of unsaturated compounds [16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…The catalyst was washed with water after 39, 57 and 64 runs of C 20 alcohol hydrogenation [21]. This treatment lead to a noticeable increase in the reaction rate.…”

mentioning

confidence: 99%

Polysaccharide-Stabilized Palladium Nanocatalyst for Semi-Hydrogenation of Complex Alkynols

Жармагамбетова¹,

Zhurinov²

2019

OF THE NATIONAL ACADEMY OF SCIENCES OF THE REPUBLIC OF KAZAKHST

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News of the Academy of sciences of the Republic of Kazakhstan 2 NAS RK is pleased to announce that News of NAS RK. Series of chemistry and technologies scientific journal has been accepted for indexing in the Emerging Sources Citation Index, a new edition of Web of Science. Content in this index is under consideration by Clarivate Analytics to be accepted in the Science Citation Index Expanded, the Social Sciences Citation Index, and the Arts & Humanities Citation Index. The quality and depth of content Web of Science offers to researchers, authors, publishers, and institutions sets it apart from other research databases. The inclusion of News of NAS RK. Series of chemistry and technologies in the Emerging Sources Citation Index demonstrates our dedication to providing the most relevant and influential content of chemical sciences to our community. Қазақстан Республикасы Ұлттық ғылым академиясы "ҚР ҰҒА Хабарлары. Химия жəне технология сериясы" ғылыми журналының Web of Science-тің жаңаланған нұсқасы Emerging Sources Citation Index-те индекстелуге қабылданғанын хабарлайды. Бұл индекстелу барысында Clarivate Analytics компаниясы журналды одан əрі the Science Citation Index Expanded, the Social Sciences Citation Index жəне the Arts & Humanities Citation Index-ке қабылдау мəселесін қарастыруда. Webof Science зерттеушілер, авторлар, баспашылар мен мекемелерге контент тереңдігі мен сапасын ұсынады. ҚР ҰҒА Хабарлары. Химия жəне технология сериясы Emerging Sources Citation Index-ке енуі біздің қоғамдастық үшін ең өзекті жəне беделді химиялық ғылымдар бойынша контентке адалдығымызды білдіреді. НАН РК сообщает, что научный журнал «Известия НАН РК. Серия химии и технологий» был принят для индексирования в Emerging Sources Citation Index, обновленной версии Web of Science. Содержание в этом индексировании находится в стадии рассмотрения компанией Clarivate Analytics для дальнейшего принятия журнала в the Science Citation Index Expanded, the Social Sciences Citation Index и the Arts & Humanities Citation Index. Web of Science предлагает качество и глубину контента для исследователей, авторов, издателей и учреждений. Включение Известия НАН РК в Emerging Sources Citation Index демонстрирует нашу приверженность к наиболее актуальному и влиятельному контенту по химическим наукам для нашего сообщества.

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Effect of Polymers on the Formation of Nanosized Palladium Catalysts and Their Activity and Selectivity in the Hydrogenation of Acetylenic Alcohols

Cited by 5 publications

References 10 publications

Synthesis of polymer protected Pd–Ag/ZnO catalysts for phenylacetylene hydrogenation

Synthesis of polymer protected Pd–Ag/ZnO catalysts for phenylacetylene hydrogenation

Modification of Montmorillonite with Polyethylene Oxide and Its Use as Support for Pd0 Nanoparticle Catalysts

Polysaccharide-Stabilized Palladium Nanocatalyst for Semi-Hydrogenation of Complex Alkynols

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