Chitosan-Modified Palladium Catalysts in Hydrogenation of n-Hex-2-Yne

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

doi:10.1007/s11237-021-09707-0

Cited by 5 publications

(2 citation statements)

References 22 publications

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“…Последние исследования показали перспективность применения природных полисахаридов при дизайне катализаторов (Dohendou, 2021;Zharmagambetova, 2019;Nasrollahzadeh, 2020). Большое количество работ посвящены каталитическим системам на основе хитозана (Хит) (Nasrollahzadeh, 2020;Zheng, 2023;Molnár, 2019;Zharmagambetova, 2021;Kumar, 2015). Присутствие легко модифицируемых гидроксильных и аминогрупп в структуре хитозана, высокая сорбционная активность по отношению к ионам переходных металлов и его нерастворимость в органических растворителях делают его очень привлекательным.…”

Section: Introductionunclassified

Chitosan-Stabilized Catalysts for Cyclohexane Oxidation to Ka-Oil

Auyezkhanova,

Zhanuzak,

Jumekeyeva

et al. 2023

SCT

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doctor of chemistry, professor, academician of NAS RK, president of NAS RK, general director of JSC "Institute of fuel, catalysis and electrochemistry named after D.V. Sokolsky (Almaty, Kazakhstan) H = 4 Editorial board: ADEKENOV Sergazy Mynzhasarovich (deputy editor-in-chief) doctor of chemical sciences, professor, academician of NAS RK, director of the international Scientific and production holding «Phytochemistry» (Karaganda, Kazakhstan) H = 11 AGABEKOV Vladimir Enokovich (deputy editor-in-chief), doctor of chemistry, professor, academician of NAS of Belarus, honorary director of the Institute of Chemistry of new materials (Minsk, Belarus) H = 13 STRNAD Miroslav, head of the laboratory of the institute of Experimental Botany of the Czech academy of sciences, professor (Olomouc, Czech Republic) H = 66 BURKITBAYEV Mukhambetkali, doctor of chemistry, professor, academician of NAS RK, first vice-rector of al-Farabi KazNU (Almaty, Kazakhstan) H = 11 HOHMANN Judith, head of the department of pharmacognosy, faculty of Pharmacy, university of Szeged, director of the interdisciplinary center for Life sciences (Szeged, ungary) H = 38 ROSS Samir, Ph.D, professor, school of Pharmacy, national center for scientific research of Herbal Products, University of Mississippi (Oxford, USA) H = 35 KHUTORYANSKY Vitaly, Ph.D, pharmacist, professor at the University of Reading (Reading, England) H = 40 TELTAYEV Bagdat Burkhanbayuly, doctor of technical sciences, professor, corresponding member of NAS RK, ministry of Industry and infrastructure development of the Republic of Kazakhstan (Almaty, Kazakhstan) H = 13 PHARUK Asana Dar, professor at Hamdard al-Majid college of Oriental medicine. faculty of Oriental medicine, Hamdard university (Karachi, Pakistan) H = 21 FAZYLOV Serik Drakhmetovich, doctor of chemistry, professor, academician of NAS RK, deputy director for institute of Organic synthesis and coal chemistry (Karaganda, Kazakhstan) H = 6 ZHOROBEKOVA Sharipa Zhorobekovna, doctor of chemistry, professor, academician of NAS of Kyrgyzstan, Institute of Chemistry and chemical technology of NAS KR (Bishkek, Kyrgyzstan) H = 4 KHALIKOV Jurabay Khalikovich, doctor of chemistry, professor, academician of the academy of sciences of tajikistan, institute of Chemistry named after V.I. Nikitin AS RT (Tajikistan) H = 6 FARZALIEV Vagif Medzhid ogly, doctor of chemistry, professor, academician of NAS of Azerbaijan (Azerbaijan) H = 13 GARELIK Hemda, PhD in chemistry, president of the department of Chemistry and Environment of the International Union of Pure and Applied Chemistry (London, England) H = 15 News of the National Academy of Sciences of the Republic of Kazakhstan. Series of chemistry and technology.

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Section: Introductionunclassified

Chitosan-Stabilized Catalysts for Cyclohexane Oxidation to Ka-Oil

Auyezkhanova,

Zhanuzak,

Jumekeyeva

et al. 2023

SCT

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show abstract

“…Chitosan (Chit) is started to use [8], mainly due to its high affinity for metal ions [20]. A number of works are devoted to catalysts for processes such as hydrogenation [1,33,34], oxidation [3,4], coupling reaction and other possible catalytic syntheses [8,19,20,35]. There are few data on pectin-containing catalysts, their design and use as stabilizer for metal nanoparticles [2][3][4][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Polysaccharide-Stabilized Pd-Ag Nanocatalysts for Hydrogenation of 2-Hexyn-1-Ol

Zharmagambetova,

Talgatov,

Auyezkhanova

et al. 2023

Preprint

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A new one-pot technique for preparation of polysaccharide-based Pd- and Pd-Ag nanocatalysts by sequential supporting natural polymer (2-hydroxyethyl cellulose (HEC), chitosan (Chit), pectin (Pec)) and metals on zinc oxide was developed. The nanocatalysts based on polysaccharide were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET), infrared spectroscopy (IRS), X-ray powder diffraction (XRD), X-ray photoelectron spectra (XPS) and elemental analysis methods. The catalyst characterization results indicated complete adsorption of polysaccharide and metal ions on zinc oxide, forming polymer-stabilized Pd nanoparticles of ~2 nm in size, evenly distributed on the support surface. The catalysts were studied in the hydrogenation of 2-hexyn-1-ol under mild conditions (0.1 MPa, 40 °C). The catalysts demonstrated nearly the same conversion of 2-hexyn-1-ol. The selectivity to cis-hexen-1-ol of the catalysts decreases in the following order: 0.5%Pd-Ag(3:1)HEC/ZnO>0.5%Pd-Ag(3:1)Pec/ZnO>0.5%Pd-Ag(3:1)Chit/ZnO. The optimum reaction temperature and catalyst loading for the Pd-Ag catalysts modified with HEC and Chit have been determined (40 °C, 0.05 g).

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The Effect of Polymer Matrix on the Catalytic Properties of Supported Palladium Catalysts in the Hydrogenation of Alkynols

Talgatov¹,

Auyezkhanova²,

Жармагамбетова³

et al. 2023

Catalysts

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Palladium catalysts were obtained by the adsorption method involving the sequential deposition of polyvinylpyrrolidone (PVP) and then palladium ions on a modified zinc oxide surface without high-temperature calcination and reduction stages. The immobilized PVP-palladium catalysts were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET), infrared spectroscopy (IRS), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and elemental analysis methods. It was found that the introduction of polymer into the catalyst’s composition promotes the dispersion and uniform distribution of active phase nanoparticles (PdO, Pd0) on the surface of zinc oxide. The catalysts were tested in the hydrogenation of complex acetylene alcohol, 3,7,11-trimethyldodecyn-1-ol-3 (C15-yn) under mild conditions (0.1 MPa, 40 °C). For comparison, studies on stereoselective hydrogenation of the short-chain alcohol 2-hexynol-1 were performed. It was shown that modification of the catalyst with polymer improves its catalytic properties. High C15-alkenol selectivity (98%), activity (W = 70 × 10−6 mol/s), and stability (turnover number (TON) 62,000) were achieved on a Pd-PVP/ZnO catalyst. Varying the active phase made it possible to reduce the metal content without deteriorating the catalytic performance of the catalyst.

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Chitosan-Modified Palladium Catalysts in Hydrogenation of n-Hex-2-Yne

Cited by 5 publications

References 22 publications

Chitosan-Stabilized Catalysts for Cyclohexane Oxidation to Ka-Oil

Chitosan-Stabilized Catalysts for Cyclohexane Oxidation to Ka-Oil

Polysaccharide-Stabilized Pd-Ag Nanocatalysts for Hydrogenation of 2-Hexyn-1-Ol

The Effect of Polymer Matrix on the Catalytic Properties of Supported Palladium Catalysts in the Hydrogenation of Alkynols

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