Kinetics and Catalysis最新文献_第3页

Activity of Perovskite-Containing LaFe1 – xNixO3 (x = 0, 0.6, 1)/α-Al2O3 Catalysts Prepared by Impregnation from Suspensions in a High-Temperature Decomposition of N2O 悬浮浸渍法制备LaFe1 - xNixO3 (x = 0,0.6, 1)/α-Al2O3钙钛矿高温分解N2O催化剂的活性

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2026-04-17 DOI: 10.1134/S0023158425601226

L. A. Isupova, Yu. A. Ivanova

{"title":"Activity of Perovskite-Containing LaFe1 – xNixO3 (x = 0, 0.6, 1)/α-Al2O3 Catalysts Prepared by Impregnation from Suspensions in a High-Temperature Decomposition of N2O","authors":"L. A. Isupova, Yu. A. Ivanova","doi":"10.1134/S0023158425601226","DOIUrl":"10.1134/S0023158425601226","url":null,"abstract":"Supported LaFe1 – xNixO3/α-Al2O3 (x = 0, 0.6, 1) perovskite containing catalysts are prepared by impregnation of a high-temperature block carrier based on α-Al2O3 with a suspension of the active component followed by heat treatment at 900°C. The catalysts were characterized by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), and temperature-programmed reduction with H2 (H2-TPR) methods and studied in the reaction of high-temperature decomposition of nitrous oxide. It is shown that all the supported catalysts are two-phase and contain only corundum and perovskite phases. The parameters of the crystal structure and the X-ray size of the corundum phase in the supported catalysts do not differ from the carrier. The observed slight increase in the cell volume for nickel-containing perovskites in supported catalysts may be due to an increase in the vacancy content in them. According to H2-TPR data, the temperatures of the reduction peaks of the supported catalysts do not differ from the reduction peaks of the unsupported perovskites, which indicates that the active component is not modified by the carrier. In terms of activity, the supported catalysts can be arranged in a row LaNiO3/α-Al2O3 > LaFe1 – xNixO3/α-Al2O3 > LaFeO3/α-Al2O3, which corresponds to the row activity of unsupported perovskites. Catalyst LaNiO3/α-Al2O3 with LaNiO3 content ~7%, monoliths height 20 mm and contact time 0.06 s demonstrates ~94% N2O conversion degree at 900°С.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"67 1","pages":"30 - 39"},"PeriodicalIF":1.4,"publicationDate":"2026-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148008858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Deactivation Kinetics of Zirconocene-Catalyzed Ethylene and 1-Butene Copolymerization 锆茂烯催化乙烯-丁烯共聚的失活动力学

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2026-04-17 DOI: 10.1134/S0023158425600816

Hyon-Ung Ri, Wi-Song Kim, Thae-Won Maeng, Ju-Gyong Kim, Ki-Chol O, Hyok-Chol Jo, Chung-Hyok Sin

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Recent Advances in Catalytic Hydrogenation of α-Methylstyrene α-甲基苯乙烯催化加氢研究进展

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2026-04-17 DOI: 10.1134/S002315842560097X

A. F. Maksimov, N. H. Mukhametova, Kh. E. Kharlampidi, G. A. Kutyrev

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Recent Developments of Mn3O4/p(DCPD)HIPE Nanocomposites as Catalysts in Advanced Oxidation Processes (AOPs) for Efficient Oxidative Degradation of Methylene Blue Mn3O4/p(DCPD)HIPE纳米复合材料高效氧化降解亚甲基蓝催化剂的研究进展

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2026-04-17 DOI: 10.1134/S0023158425600658

Rabia Yeşil, Sevil Çetinkaya

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The Role of Transition State Shape Selectivity in Catalytic Activity of Zeolites in the Diels–Alder Reaction: Theoretical Modeling 在Diels-Alder反应中，过渡态形状选择性在沸石催化活性中的作用：理论模型

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2026-04-17 DOI: 10.1134/S0023158425600580

I. Yakupov, D. Fakhretdinov, E. Latypova, I. Vakulin, R. Talipov

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Effect of Fe, Co and Mo Additives on Catalytic Activity of a Titania-Supported Zinc Oxide in Propane Dehydrogenation Fe、Co和Mo添加剂对钛负载氧化锌丙烷脱氢催化活性的影响

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2026-04-01 DOI: 10.1134/S0023158425600786

V. I. Sobolev, A. N. Chernov, G. A. Zenkovets, E. Yu. Gerasimov, A. A. Shutilov, A. S. Gorbunova, V. V. Kaichev, K. Yu. Koltunov

{"title":"Effect of Fe, Co and Mo Additives on Catalytic Activity of a Titania-Supported Zinc Oxide in Propane Dehydrogenation","authors":"V. I. Sobolev, A. N. Chernov, G. A. Zenkovets, E. Yu. Gerasimov, A. A. Shutilov, A. S. Gorbunova, V. V. Kaichev, K. Yu. Koltunov","doi":"10.1134/S0023158425600786","DOIUrl":"10.1134/S0023158425600786","url":null,"abstract":"Metal oxide catalysts, which can compete with commercial platinum and chromium catalysts for nonoxidative propane dehydrogenation (PDH), are of significant practical and scientific interest. In this study, the catalytic activity of bulk zinc oxide promoted with La, Y, V, Fe, Co, Ni, W, Mo, Cu, Ce, Mn, In and Sn was screened in PDH, and this allowed selection of Fe, Co, and Mo as the most promising additives. Subsequent screening of the catalytic performance of a titania-supported zinc oxide promoted by the selected elements indicated that Mo increased the short-term catalytic activity the most, while Fe and Co provided higher catalyst stability. The catalysts were characterized by low-temperature nitrogen adsorption, X-ray diffraction analysis and transmission electron microscopy. PDH reaction, catalyzed by Mo–Zn/TiO2 at 600°C and tested in fixed-bed flow-type reactor at a gas hourly space velocity (GHSV) of 7500 mL h−1 ({text{g}}_{{{text{cat}}}}^{{ - 1}}) (propane/N2 = 1/10), afforded up to 29% propane conversion with 95% propylene selectivity.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"66 6","pages":"674 - 681"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Preparation of MgAl Layered Double Hydroxides Using the Reaction Product of Activated Aluminum with Water and Synthesis of Palladium Catalysts Based on Them 用活性铝与水反应产物制备MgAl层状双氢氧化物及其钯催化剂的合成

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2026-04-01 DOI: 10.1134/S0023158425600725

O. B. Belskaya, A. I. Nizovskii, R. M. Mironenko, I. V. Muromtsev, O. V. Gorbunova, T. I. Gulyaeva, E. A. Suprun, A. V. Kalinkin, V. I. Bukhtiyarov

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Estimation of Kinetic Parameters of Ion-Coordination Polymerization Using the Right End of the Molecular Weight Distribution 利用分子量右端分布估计离子配位聚合动力学参数

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2026-04-01 DOI: 10.1134/S0023158425600907

V. M. Yanborisov, D. V. Styazhkin, S. V. Kolesov

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Synthesis of Novel Hypercrosslinked Polymer-Based Solid Acids with Pyridinium Moiety and Their Catalytic Activity in Biodiesel Production 新型吡啶基高交联聚合物固体酸的合成及其在生物柴油生产中的催化活性

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2026-04-01 DOI: 10.1134/S0023158425600737

Ziyi Guan, Kai Ma, Xuezheng Liang

{"title":"Synthesis of Novel Hypercrosslinked Polymer-Based Solid Acids with Pyridinium Moiety and Their Catalytic Activity in Biodiesel Production","authors":"Ziyi Guan, Kai Ma, Xuezheng Liang","doi":"10.1134/S0023158425600737","DOIUrl":"10.1134/S0023158425600737","url":null,"abstract":"A novel hypercrosslinked porous polymer-based solid acid with an embedded pyridinium moiety in the polymeric framework was synthesized via the quaternization of 4,4'-bipyridine (BPy) and 4,4'-bis(chloromethyl)-1,1'-biphenyl (BCMBP), followed by polycondensation and sulfonation. This approach represents a key advancement by integrating the pyridinium moiety directly into the rigid polymer skeleton, thereby effectively preventing pore blockage typically encountered with physically immobilized bulky ionic liquids (ILs). The polymer possesses a rigid biphenyl framework, which provides sufficient sulfonation sites for high acidity. The hypercrosslinked structure ensures high stability and a surface area of 1162 m2/g for the solid acid. The ionic liquid moiety in the polymer provides special active sites, and the free coordinating anions make these sites highly accessible to reactants. The novel hypercrosslinked porous polymer-based solid acid with a pyridinium moiety exhibited high catalytic activity in biodiesel synthesis via the esterification of oleic acid (98.7% conversion) and the integrated esterification-transesterification of waste oil (99.1% total yield), respectively. The novel solid acid could be recycled nine times with minimal activity loss (from 99.1 to 97.2%). The pyridinium moiety, high surface area, high acidity (3.4 mmol/g), and rigid aromatic framework were the key factors contributing to the high activity, making the novel solid acid a promising candidate for industrial applications.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"66 6","pages":"769 - 777"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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The Role of Fe and Mg Oxides in the Etching of Polycrystalline Platinum during Catalytic Oxidation of Ammonia with Air at 1133 K 铁和镁氧化物在1133 K空气催化氧化氨过程中蚀刻多晶铂中的作用

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2026-04-01 DOI: 10.1134/S0023158425600622

A. N. Salanov, A. N. Serkova, A. S. Zhirnova, L. A. Isupova, V. N. Parmon

{"title":"The Role of Fe and Mg Oxides in the Etching of Polycrystalline Platinum during Catalytic Oxidation of Ammonia with Air at 1133 K","authors":"A. N. Salanov, A. N. Serkova, A. S. Zhirnova, L. A. Isupova, V. N. Parmon","doi":"10.1134/S0023158425600622","DOIUrl":"10.1134/S0023158425600622","url":null,"abstract":"High-temperature oxidation of NH3 with air to NO oxide on catalytic platinum alloy gauzes is used in the industrial production of nitric acid. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) with the probe electron energy of 5 and 20 keV were used to characterize chemical composition of the etching structure on Pt(poly) after NH3 oxidation with air at a pressure of 3.6 bar and 1133 К. Pt, Fe, Si, Al, Mg, O, N and C were detected in the etching structures, which contain oxide particles, crystal platinum pyramids and etch pits (grooves). Pt and О were detected in high concentrations (22.2–69.0 at %), while other elements—in low ones (0.2–8.4 at %). Oxide particles ca. 100 nm in size with the composition MgFe2O4 and a spinel structure are formed from Mg, Fe impurities during NH3 oxidation. Nucleation and growth of platinum pyramids, etch pits and deep etch grooves proceed during the capture of Pt and PtO2 from gas phase by MgFe2O4 particles, migration of Pt atoms through the oxide particles to the metal-oxide boundary, and their attachment to the Pt crystal lattice. The formation of etching structure can proceed by the vapor-liquid-solid (VLS) mechanism.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"66 6","pages":"656 - 673"},"PeriodicalIF":1.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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