Kinetics and Catalysis最新文献

Reassembled Nanosheets of Layered Perovskite-Like Niobate HCa2Nb3O10 as Photocatalysts for Hydrogen Production from Aqueous Solutions of Plant Biomass Processing Products 层状透辉石类铌酸盐 HCa2Nb3O10 的重组装纳米片作为光催化剂，用于从植物生物质加工产品的水溶液中制氢

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2024-11-04 DOI: 10.1134/S0023158424601943

S. A. Kurnosenko, O. I. Silyukov, I. A. Rodionov, I. A. Minich, A. I. Ustinova, I. A. Zvereva

引用次数: 0

Aromatic Cross-Conjugated Hydrazones as Inhibitors of the Radical Chain Oxidation of Styrene 作为苯乙烯自由基链氧化抑制剂的芳香族交叉共轭肼酮

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2024-11-04 DOI: 10.1134/S0023158424601852

S. A. Grabovskii, I. S. Odin, A. A. Golovanov, A. V. Antipin, R. L. Safiullin

{"title":"Aromatic Cross-Conjugated Hydrazones as Inhibitors of the Radical Chain Oxidation of Styrene","authors":"S. A. Grabovskii, I. S. Odin, A. A. Golovanov, A. V. Antipin, R. L. Safiullin","doi":"10.1134/S0023158424601852","DOIUrl":"10.1134/S0023158424601852","url":null,"abstract":"The bond dissociation enthalpy of the N–H bond was calculated for the following compounds: 1-((E)-1,5-diphenylpent-1-en-4-yn-3-ylidene)-2-(o-tolyl)hydrazine, 1-((E)-1-(4-methoxyphenyl)-5-phenylpent-1-en-4-yn-3-ylidene)-2-phenylhydrazine, 1-((E)-1-phenylpent-1-en-4-yn-3-ylidene)-2-(p-tolyl)hydrazine, 1-((E)-1-(4-methoxyphenyl)-5-trimethylsilyl-1-en-4-yn-3-ylidene)-2-phenylhydrazine, and 1-((E)-1-(toiphenyl-2)-5-phenylpent-1-en-4-yn-3-ylidene)-2-phenylhydrazine. The calculations were performed by the M06-2X/6-311+G(2df,2pd)//B3LYP/6-31G(d) method using the homodesmotic approach. The bond dissociation enthalpy is lower than 77 kcal/mol for all the cross-conjugated hydrazone derivatives under study. The experimental rate constants for the reactions of the derivatives with peroxyl radicals in chlorobenzene during the initiated styrene oxidation are comparable to those of aromatic amines and are in the range (1.1–2.5) × 105 M−1 s−1. The stoichiometric inhibition coefficient depends on the structure of the derivatives and varies from 0.7 to 1.9. The inhibition is discussed within the framework of the radical mechanism.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"65 5","pages":"451 - 457"},"PeriodicalIF":1.3,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579429","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

Epoxide-Assisted Synthesis of Photocatalytically Active TiO2 and Pt/TiO2 Aerogels 环氧化物辅助合成具有光催化活性的 TiO2 和 Pt/TiO2 气凝胶

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2024-11-04 DOI: 10.1134/S0023158424601980

L. A. Polevoi, E. A. Kozlova, A. V. Zhurenok, E. Yu. Gerasimov, A. A. Saraev, M. V. Golikova, A. E. Baranchikov

引用次数: 0

Visible Light–Induced Photocatalytic Degradation of Tetracycline over Exfoliated Graphitic C3N4 Doped with Cubic Co3O4 掺杂立方氧化钴的剥离石墨 C3N4 在可见光诱导下光催化降解四环素

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2024-11-04 DOI: 10.1134/S002315842460189X

M. I. Chebanenko, Sh. O. Omarov, D. S. Dmitriev, K. D. Martinson, M. V. Tomkovich, V. I. Popkov

{"title":"Visible Light–Induced Photocatalytic Degradation of Tetracycline over Exfoliated Graphitic C3N4 Doped with Cubic Co3O4","authors":"M. I. Chebanenko, Sh. O. Omarov, D. S. Dmitriev, K. D. Martinson, M. V. Tomkovich, V. I. Popkov","doi":"10.1134/S002315842460189X","DOIUrl":"10.1134/S002315842460189X","url":null,"abstract":"In this work, steam-exfoliated graphitic carbon nitride was used as a promising basis for the development of photoactive materials for processes induced by visible light. Nanocrystalline cobalt(II,III) oxide, obtained by the solution combustion method followed by heat treatment of the reaction products, was used as a cocatalyst. Nanocomposite materials were prepared by joint ultrasonic treatment of graphite-like carbon nitride and cobalt(II,III) oxide in ethanol. The prepared series of samples with different weight fractions of the oxide (5–10 wt %) was studied by powder X-ray diffractometry, scanning electron microscopy, low-temperature nitrogen adsorption–desorption, and diffuse reflectance electron spectroscopy. The photocatalytic activity of the samples was evaluated in the oxidation of tetracycline hydrochloride. It was found that the rate constant of the photocatalytic reaction reached its maximum value with composites containing 7 wt % Co3O4 (k = 0.0104 min–1). The photovoltaic response studies demonstrated that the presence of cobalt oxide in the samples can significantly decrease the rate of charge carrier recombination to increase the generated current by a factor of 1.2.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"65 5","pages":"548 - 555"},"PeriodicalIF":1.3,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579432","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

Photocatalytic Activity of Heterostructures Based on Graphite-Like Carbon Nitride Modified with Few-Layer Black Phosphorus and Cobalt Phosphide in the Hydrogen Evolution Reaction 基于经少层黑磷和磷化钴修饰的类石墨氮化碳的异质结构在氢气进化反应中的光催化活性

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2024-11-04 DOI: 10.1134/S0023158424601979

Aidar M. Kuchkaev, A. V. Zhurenok, Airat M. Kuchkaev, A. V. Sukhov, V. S. Kashansky, M. M. Nikitin, K. A. Litvintseva, S. V. Cherepanova, E. Yu. Gerasimov, E. A. Kozlova, O. G. Sinyashin, D. G. Yakhvarov

{"title":"Photocatalytic Activity of Heterostructures Based on Graphite-Like Carbon Nitride Modified with Few-Layer Black Phosphorus and Cobalt Phosphide in the Hydrogen Evolution Reaction","authors":"Aidar M. Kuchkaev, A. V. Zhurenok, Airat M. Kuchkaev, A. V. Sukhov, V. S. Kashansky, M. M. Nikitin, K. A. Litvintseva, S. V. Cherepanova, E. Yu. Gerasimov, E. A. Kozlova, O. G. Sinyashin, D. G. Yakhvarov","doi":"10.1134/S0023158424601979","DOIUrl":"10.1134/S0023158424601979","url":null,"abstract":"The photocatalytic activity of 2D/2D/0D heterostructures based on few-layer black phosphorus (FLBP) g-C3N4/FLBP/Co2P in the reaction of photocatalytic hydrogen formation from an aqueous solution of triethanolamine under under visible light irradiation (400 nm) was studied for the first time. An original method for the preparation of the g‑C3N4/FLBP/Co2P composite photocatalyst is proposed, which consists of the solvothermal synthesis of cobalt phosphide Co2P nanoparticles, their immobilization on the surface of FLBP, and subsequent mixing of the FLBP/Co2P heterostructure with g‑C3N4. The synthesized photocatalysts were characterized by physicochemical analytical methods (X-ray diffraction, X-ray photoelectron spectroscopy, high-resolution transmission microscopy, energy-dispersive X-ray spectroscopy). The hydrogen evolution rate in the presence of the g‑C3N4/FLBP/Co2P heterostructure was 0.09 mmol ({text{g}}_{{{text{cat}}}}^{{ - 1}}) h–1, which is 25 times higher than the same characteristic for the unmodified g‑C3N4 sample. The obtained numerical values of the photocatalytic activity are at the level of the literature values.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"65 5","pages":"579 - 585"},"PeriodicalIF":1.3,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579411","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

Photocatalysis for Energy, Environmental Protection, and Sustainable Development 光催化技术促进能源、环境保护和可持续发展

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2024-11-04 DOI: 10.1134/S0023158424601955

Editorial Board

引用次数: 0

Oxygen-Free Reforming of Methane into Synthesis Gas in the Presence of H2, H2O, CO, and CO2 Additives Taking into Account the Formation of Soot Particles 考虑到烟尘颗粒的形成，在有 H2、H2O、CO 和 CO2 添加剂的情况下将甲烷无氧转化为合成气

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2024-11-04 DOI: 10.1134/S0023158424601906

A. R. Akhunyanov, P. A. Vlasov, V. N. Smirnov, A. V. Arutyunov, V. S. Arutyunov

{"title":"Oxygen-Free Reforming of Methane into Synthesis Gas in the Presence of H2, H2O, CO, and CO2 Additives Taking into Account the Formation of Soot Particles","authors":"A. R. Akhunyanov, P. A. Vlasov, V. N. Smirnov, A. V. Arutyunov, V. S. Arutyunov","doi":"10.1134/S0023158424601906","DOIUrl":"10.1134/S0023158424601906","url":null,"abstract":"The kinetic modeling of high-temperature reforming of oxygen-free mixtures of methane with H2, H2O, CO, and CO2 additives into synthesis gas with strong dilution with argon under conditions of variable temperature and the formation of microheterogeneous soot particles was carried out. Such mixtures are typical for biomass gasification products, in which H2O, CO, and CO2 additives act as oxidizing agents. A direct comparison of kinetic calculations with the results of published experiments in a flow reactor at temperatures of 1100–1800 K, atmospheric pressure, and a reaction time of 0.68 s was carried out. The yields of soot were calculated for all test mixtures and conditions. A comparison of the results of kinetic calculations and experiments made it possible to evaluate the effect of soot formation on the reforming of methane with the additions of H2, H2O, CO, and CO2. The work analyzes two ways for carbon atoms to leave a reacting gas-phase system. The first way is the heterogeneous deposition of acetylene molecules from the gas phase onto the surface of the reactor with the subsequent formation of solid carbon, and the second way is the formation of microheterogeneous soot particles from nuclei in the gas phase. The paper compares the results of experiments in reflected shock waves and our kinetic calculations of the absolute concentration of CO for the process of methane oxidation in oxygen-free mixtures of methane and CO2. Mixtures with various CH4/CO2 ratios, 90/10, 75/25, and 50/50, were studied at temperatures above 2200 K and atmospheric pressure. It has been shown that the agreement between the calculated and measured CO concentrations improved with increasing temperature and CO2 fraction in the mixture.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"65 5","pages":"421 - 439"},"PeriodicalIF":1.3,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579428","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

SAXS Study of Pt Precursor Transformations during the Preparation of Supported Catalysts 制备支撑催化剂过程中铂前驱体转化的 SAXS 研究

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2024-11-04 DOI: 10.1134/S0023158424601621

Yu. V. Larichev

引用次数: 0

Optimization of c/rh-In2O3-Based Electrode Technology for Photoelectrochemical Systems 优化光电化学系统中基于 c/rh-In2O3 的电极技术

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2024-11-04 DOI: 10.1134/S0023158424601918

T. A. Molodtsova, A. B. Kuriganova, L. N. Fesenko, I. N. Leontyev, N. V. Smirnova

{"title":"Optimization of c/rh-In2O3-Based Electrode Technology for Photoelectrochemical Systems","authors":"T. A. Molodtsova, A. B. Kuriganova, L. N. Fesenko, I. N. Leontyev, N. V. Smirnova","doi":"10.1134/S0023158424601918","DOIUrl":"10.1134/S0023158424601918","url":null,"abstract":"This work systematically investigated the influence of fabrication parameters on photoelectrodes of a biphasic indium oxide polymorph (In2O3) with cubic (c-) and rhombohedral (rh-) phase contents of 72 and 28%, respectively, deposited on the surface of conductive fluorine-doped tin oxide (FTO) glass. The study examined the effects of varying the concentration of c/rh-In2O3 suspension, the composition of the dispersion medium, the number of cycles, and the mode of suspension application onto FTO glass. Linear voltammetry, chronoamperometry, and impedance spectroscopy in the illumination mode were used to demonstrate that the photoelectrode made with a suspension based on isopropyl alcohol at an c/rh-In2O3 concentration of 100 g/L exhibited the highest photocurrent density and the lowest charge transfer resistance in an aqueous electrolyte solution of 0.5 M Na2SO4 + 0.25 M Na2SO3. It has been shown that the optimal approach was to apply three layers using a multistage application mode. The results obtained can be used as a basis for the development of optimization protocols for the photoelectrodes based on oxide-containing systems and photoelectrochemical devices based on c/rh-In2O3 material.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"65 5","pages":"597 - 604"},"PeriodicalIF":1.3,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579546","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

Synthesis and Investigations of Insoluble Keggin-Type Phosphomolybdovanadates with Cs+ Counterion 含 Cs+ 反离子的不溶性凯金型磷钼钒酸盐的合成与研究

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2024-11-04 DOI: 10.1134/S002315842460144X

Y. Rodikova, T. Kardash, E. Zhizhina

{"title":"Synthesis and Investigations of Insoluble Keggin-Type Phosphomolybdovanadates with Cs+ Counterion","authors":"Y. Rodikova, T. Kardash, E. Zhizhina","doi":"10.1134/S002315842460144X","DOIUrl":"10.1134/S002315842460144X","url":null,"abstract":"Vanadium-containing heteropoly compounds (HPCs), both in homogeneous and heterogeneous forms, represent a very promising class of materials with adjustable acid and oxidative properties. Herein, a catalytically active HPCs of H3+xPMo12–xVxO40 (x = 1–4) gross-composition were prepared by an environmentally friendly H2O2-affected approach and heterogenized in the form of insoluble salts with Cs+ counterion to obtain stable oxidation catalysts. Structural and textural characteristics of prepared compounds with Cs2.5+xH0.5PMo12–xVxO40 (x = 1–4) gross-composition were investigated by XRD, TGA, IR-ATR, ICP-AES, and N2 adsorption-desorption techniques, and their catalytic properties were tested in the oxidation of 5-hydroxymethylfurfural (5-HMF), a valuable biomass-derived platform chemical. The obtained materials were established to demonstrate retention of the initial Keggin structure during precipitation, low solubility in water, and high structural stability upon fourfold treatment with H2O for 3 h, as well as thermal stability up to 400°C. It was shown that a simple method of replacing H+ ions with large Cs+ cations allows a traditional homogeneous catalyst to function heterogeneously, which simplifies the process of its separation and recycling. The catalytic performance was shown to decrease gradually with reducing x value. The attained Cs5.5H0.5PMo9V3O40 and Cs6.5H0.5PMo8V4O40 solids revealed high activity in 5-HMF transformation to 2,5-diformylfuran with a yield of up to 93%, which opens up prospects for their application in various important fields of synthetic chemistry as heterogeneous oxidation catalysts.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"65 5","pages":"469 - 480"},"PeriodicalIF":1.3,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142579549","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