Kinetics and Catalysis最新文献

Oleg Naumovich Temkin (On His 90th Birthday) 奥列格·瑙莫维奇·特姆金（庆祝他90岁生日）

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2025-09-04 DOI: 10.1134/S0023158425600609

L. G. Bruk, O. L. Kalya, V. R. Flid, G. K. Shestakov

引用次数: 0

6-Amino-5-hydroxy-2,3-dimethylpyrimidin-4(3H)-one as an Oxidation Inhibitor 6-氨基-5-羟基-2,3-二甲基嘧啶-4(3H)- 1作为氧化抑制剂

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2025-09-04 DOI: 10.1134/S0023158424602420

A. R. Migranov, L. R. Yakupova, R. L. Safiullin, S. A. Grabovsky

{"title":"6-Amino-5-hydroxy-2,3-dimethylpyrimidin-4(3H)-one as an Oxidation Inhibitor","authors":"A. R. Migranov, L. R. Yakupova, R. L. Safiullin, S. A. Grabovsky","doi":"10.1134/S0023158424602420","DOIUrl":"10.1134/S0023158424602420","url":null,"abstract":"The rate constant of the reaction of 6-amino-5-hydroxy-2,3-dimethylpyrimidin-4(3H)-one (1) with peroxyl radicals was measured in a model system of radical chain oxidation of 1,4-dioxane. Oxidation of 1,4-dioxane with atmospheric oxygen was carried out at a temperature of 333 K. Oxygen uptake was monitored using a universal differential manometric setup. It was found that 6-amino-5-hydroxy-2,3-dimethylpyrimidin-4(3H)-one slowed down the rate of 1,4-dioxane oxidation. The effective rate constant of the interaction of the peroxyl radical of 1,4-dioxane with 6-amino-5-hydroxy-2,3-dimethylpyrimidin-4(3H)-one was found: fk7 = (6.2 ± 0.1) × 105 L mol–1 s–1. The stoichiometric inhibition coefficient f = 1.3 ± 0.1 was calculated from the slope of the dependence of the induction period length on the concentration of 6-amino-5-hydroxy-2,3-dimethylpyrimidin-4(3H)-one. The experimental data indicated that 6-amino-5-hydroxy-2,3-dimethylpyrimidin-4(3H)-one has antioxidant properties. It was assumed that the hydroxyl group –OH located in the 5-position of the ring was the site attacked by the peroxyl radical.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"66 3","pages":"280 - 285"},"PeriodicalIF":1.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144990502","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}

引用次数: 0

Titanium–Magnesium Catalysts for Propylene Polymerization: Synthesis with Ethers and Subsequent Adding of Dibutyl Phthalate 丙烯聚合用钛镁催化剂：醚合成及邻苯二甲酸二丁酯的加入

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2025-09-04 DOI: 10.1134/S0023158424602742

D. K. Maslov, G. D. Bukatov

{"title":"Titanium–Magnesium Catalysts for Propylene Polymerization: Synthesis with Ethers and Subsequent Adding of Dibutyl Phthalate","authors":"D. K. Maslov, G. D. Bukatov","doi":"10.1134/S0023158424602742","DOIUrl":"10.1134/S0023158424602742","url":null,"abstract":"Propylene polymerization titanium–magnesium catalysts in the presence of ethers are synthesized. It is shown that aliphatic ethers and 1.1-diethers are participated in the formation of magnesium chloride although they are not contained in catalysts. Aromatic ethers (except methyl phenyl ether) are ineffective in the MgCl2 formation. Subsequent adding of the phthalate (DBP/Mg = 0.05 mol) lead to the synthesis of the phtalate titanium–magnesium catalyst which in the case of aliphatic ethers and 1.1-diethers have catalytic properties higher than the titanium–magnesium catalyst for comparison (DBP/Mg = 0.05 mol) and close ones (for some ethers) to the standard titanium–magnesium catalysts (DBP/Mg = 0.2 mol). Comparative analysis of the composition of phthalate titanium–magnesium catalysts prepared using ethers or ketones and X-ray data indicate a close size of MgCl2 crystallites in both cases. The composition of titanium–magnesium catalysts synthesized in the presence of ethers is consistent with the distribution of dimeric TiCl4 complexes alternating with chlorine vacancies (…□TiTi□TiTi…) on the lateral cuts 104.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"66 3","pages":"330 - 341"},"PeriodicalIF":1.4,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144990426","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}

引用次数: 0

Methylcyclohexane Dehydrogenation on Platinum–Alumina Catalysts Promoted with Vanadium and Tin 钒锡促进铂-氧化铝催化剂甲基环己烷脱氢研究

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2025-09-04 DOI: 10.1134/S002315842560018X

A. D. Lozhkin, N. S. Panina, T. M. Buslaeva, L. G. Bruk

引用次数: 0

XPS Study of the [Ir(COD)Cl]2–L–SiO2 Catalytic System [Ir(COD)Cl] 2-L-SiO2催化体系的XPS研究

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2025-08-05 DOI: 10.1134/S002315842560004X

A. V. Nartova, K. G. Donskikh, R. I. Kvon, L. M. Kovtunova, A. M. Dmitrachkov, I. V. Skovpin, I. V. Koptyug, V. I. Bukhtiyarov

{"title":"XPS Study of the [Ir(COD)Cl]2–L–SiO2 Catalytic System","authors":"A. V. Nartova, K. G. Donskikh, R. I. Kvon, L. M. Kovtunova, A. M. Dmitrachkov, I. V. Skovpin, I. V. Koptyug, V. I. Bukhtiyarov","doi":"10.1134/S002315842560004X","DOIUrl":"10.1134/S002315842560004X","url":null,"abstract":"The X-ray photoelectron spectroscopy (XPS) and nuclear magnetic resonance (NMR) spectroscopy were used to study the features of anchoring of the [Ir2(COD)2Cl2] complex on the surface of modified silica gel L–SiO2 (where L is NC5H5–CH2–CH2–, N(CH3)2–CH2–CH2–CH2–, NH2–C3H6–) depending on the nature of the linker and the conditions of preparation of the systems. The catalytic activity was tested in reactions of gas-phase selective hydrogenation of propylene with parahydrogen (p-H2). According to the XPS data, a single-site iridium catalyst is prepared in all cases. Analysis of the XPS spectra indicates the possibility of anchoring the complex through one of the iridium atoms while preserving the dimer. It was shown that at different durations of interaction of the iridium complex solution with modified NH2–C3H6–silica gel approximately the same amount of the complex is anchored, but the nature of the complex coordination changes. For the sample obtained by long-term interaction of the complex solution with the modified support (24 h), a high increase in the NMR signal was observed at 60°C, while in the case of the sample prepared by short-term interaction (1 h), the signal increased with a rise in temperature to 80°C.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"66 2","pages":"248 - 256"},"PeriodicalIF":1.4,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162055","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}

引用次数: 0

Active and Stable Ni/Al2O3–(Zr + Ce)O2 Catalyst for Syngas Production via Glycerol Dry Reforming 甘油干重整制合成气的活性稳定Ni/Al2O3 - (Zr + Ce)O2催化剂

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2025-08-05 DOI: 10.1134/S0023158425600312

Yuri Fionov, Sophya Semenova, Seraphim Khaibullin, Elena Fionova, Irena Bratchikova, Andrey Kharlanov, Anna Zhukova

引用次数: 0

Catalytic Properties of a Nanozyme Based on Silver Nanoparticles Immobilized into a Polymethacrylate Matrix 聚合甲基丙烯酸酯基固定化银纳米酶的催化性能研究

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2025-08-05 DOI: 10.1134/S002315842560035X

S. K. Bragina, N. A. Gavrilenko, N. V. Saranchina, M. A. Gavrilenko

引用次数: 0

Mathematical Modeling of Complex Oscillations during Ethylene Oxidation over a Nickel Catalyst 镍催化剂上乙烯氧化过程中复杂振荡的数学建模

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2025-08-05 DOI: 10.1134/S0023158424602535

M. M. Slinko, N. L. Semendyaeva, A. G. Makeev, V. Yu. Bychkov

引用次数: 0

Effect of the Modification Method of TiO2 Nanotubes with Cu2O on Their Activity in Photoelectrochemical Water Splitting Cu2O修饰TiO2纳米管对其光电分解水活性的影响

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2025-08-05 DOI: 10.1134/S0023158425600348

N. A. Zos’ko, A. S. Aleksandrovsky, T. A. Kenova, M. A. Gerasimova, N. G. Maksimov, A. M. Zhizhaev, O. P. Taran

{"title":"Effect of the Modification Method of TiO2 Nanotubes with Cu2O on Their Activity in Photoelectrochemical Water Splitting","authors":"N. A. Zos’ko, A. S. Aleksandrovsky, T. A. Kenova, M. A. Gerasimova, N. G. Maksimov, A. M. Zhizhaev, O. P. Taran","doi":"10.1134/S0023158425600348","DOIUrl":"10.1134/S0023158425600348","url":null,"abstract":"Electrodes based on TiO2 nanotube arrays for the photoelectrochemical process of water splitting were modified with Cu2O, a p-type semiconductor (p-Cu2O). Cyclic voltammetry (CV) was used for the deposition of p-Cu2O nanoparticles to achieve a more uniform distribution of the particles over the inner and outer surfaces of TiO2 nanotubes. The measurements of incident photon-to-current conversion efficiency (IPCE) in the range of 365–660 nm demonstrated that the proposed method significantly enhanced photoactivity in the visible light region compared to the potentiostatic deposition method. The IPCE value was 0.18% at a wavelength of 523 nm, which was 7 and 45 times higher than those for the potentiostatically modified and pristine samples, respectively. Under continuous illumination with visible light at a wavelength of 523 nm and a potential of 0.2 V (Ag/AgCl(sat.)), a transition from Cu2O to CuO was observed for 5 h, which was accompanied by a decrease in the photocurrent density.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"66 2","pages":"222 - 231"},"PeriodicalIF":1.4,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161954","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}

引用次数: 0

Preliminary Study of Alkyl Levulinate Synthesis using Aliphatic Primary Alcohols Catalyzed by Zinc Oxide 氧化锌催化脂肪族伯醇合成乙酰丙酸烷基的初步研究

IF 1.4 4区化学

Kinetics and Catalysis Pub Date : 2025-07-30 DOI: 10.1134/S0023158424601402

Jéssyca Kaenny de Andrade Bezerra, Jean-Michel Lavoie, Thierry Ghislain, Lindemberg de Jesus Nogueira Duarte, Eduardo Lins de Barros Neto

{"title":"Preliminary Study of Alkyl Levulinate Synthesis using Aliphatic Primary Alcohols Catalyzed by Zinc Oxide","authors":"Jéssyca Kaenny de Andrade Bezerra, Jean-Michel Lavoie, Thierry Ghislain, Lindemberg de Jesus Nogueira Duarte, Eduardo Lins de Barros Neto","doi":"10.1134/S0023158424601402","DOIUrl":"10.1134/S0023158424601402","url":null,"abstract":"The utilization of lignocellulosic biomass for the production of energy, biofuels, and chemical products has become increasingly viable from technical, economic, and environmental perspectives, particularly when the biomass is sourced from agricultural waste. The conversion of biomass-derived levulinic acid (LA) into biofuel alkyl levulinate (AL) using alcohols as the alkoxy group (R–O) donor and reaction medium represents a promising synthesis route for AL, which is regarded as an environmentally friendly chemical product. In this study, we investigated the synthesis of alkyl levulinate from linear-chain alcohols (R–OH: 1-butanol, 1-octanol, 1-decanol, 1-dodecanol, and 1-tetradecanol) catalyzed by zinc oxide (ZnO) under the following conditions: LA : ROH molar ratio of 1 : 1, 1 wt % ZnO, temperature of 125°C, and reaction duration of 3 h. Our findings indicate that under the studied reaction conditions, the conversion of LA gradually decreases as the alcohol chain lengthens. The ester yields (%) were as follows: butyl levulinate—100, octyl levulinate—80, decyl levulinate—72, dodecyl levulinate—69 and tetradecyl levulinate—64. This trend is directly related to the physicochemical properties of the synthesized levulinates, including boiling point, polarity, and miscibility.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"66 3","pages":"312 - 319"},"PeriodicalIF":1.4,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144990504","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}

引用次数: 0