Russian Journal of Physical Chemistry A最新文献_第6页

Study on N2O Catalytic Decomposition and Reaction Kinetics over Composite Metal Oxides of Ce–Cu/Co/Al2O3 铈- cu /Co/Al2O3复合金属氧化物N2O催化分解及反应动力学研究

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-02-04 DOI: 10.1134/S0036024425703182

Yuanyang Zhang, Linqi Wang, Xiangyu Guo, Licong Meng

{"title":"Study on N2O Catalytic Decomposition and Reaction Kinetics over Composite Metal Oxides of Ce–Cu/Co/Al2O3","authors":"Yuanyang Zhang, Linqi Wang, Xiangyu Guo, Licong Meng","doi":"10.1134/S0036024425703182","DOIUrl":"10.1134/S0036024425703182","url":null,"abstract":"A series of catalysts of Co/Al2O3, Cu/Co/Al2O3, and Ce–Cu/Co/Al2O3 have been prepared by impregnation method in this study. The experimental results showed that the activity of Cu/Co/Al2O3 on N2O decomposition was increased significantly with the increase of Cu/Co mass ratio. The activity of catalytic N2O decomposition was optimal when the Cu/Co mass ratio was 0.6 under experimental conditions used. On this basis, a series of catalysts of Ce–Cu/Co/Al2O3 were prepared. H2-TPR results indicated that the temperature of low and high-temperature reduction peaks of Ce–Cu/Co/Al2O3 was relatively decreased by about 20 and 80°C compared with the sample of Cu/Co/Al2O3, respectively. The experimental results showed that the activity of Ce–Cu/Co/Al2O3 on N2O decomposition was increased with increasing the mass ratio of Ce/Cu, while the catalytic activity on decomposition of N2O was best when the mass ratio of Ce/Cu was reached to 1.2. Furthermore, the catalyst of Ru/Ce–Cu/Co/Al2O3 was prepared by programmed-impregnation method. XRD characterization results over Ce–Cu/Co/Al2O3 and Ru/Ce–Cu/Co/Al2O3 samples showed that the structure of the two catalysts was basically similar before and after Ru doped. The experimental data showed that the Ru/Ce–Cu/Co/Al2O3 catalyst had better N2O decomposition performance. Stability test showed that it had good low-temperature activity and stability, which provided the basis for further related research.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 14","pages":"3523 - 3531"},"PeriodicalIF":0.8,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147337212","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

Synergistic Effect of Hydrophilic Surface and Porous Structure on Lithium Extraction by Titanium Ion Sieves 亲水表面和多孔结构对钛离子筛萃取锂的协同作用

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-02-04 DOI: 10.1134/S0036024425703285

Li-Yuan Zhang, Jingjing Zhang, Zhenye Wang, Xia-Zhong Zhang, Hai-Xia Zhu, Ming-Cheng Zhao, Jia-Xin Ying, Jia-Rong Zou, Hong Wang, Yan Chen, Li Zhao

{"title":"Synergistic Effect of Hydrophilic Surface and Porous Structure on Lithium Extraction by Titanium Ion Sieves","authors":"Li-Yuan Zhang, Jingjing Zhang, Zhenye Wang, Xia-Zhong Zhang, Hai-Xia Zhu, Ming-Cheng Zhao, Jia-Xin Ying, Jia-Rong Zou, Hong Wang, Yan Chen, Li Zhao","doi":"10.1134/S0036024425703285","DOIUrl":"10.1134/S0036024425703285","url":null,"abstract":"The H2TiO3 ion sieves have demonstrated as a promising adsorbent for lithium extraction from liquid lithium resources. However, it is still challenging to simultaneously manipulate the surface hydrophilicity and micro-structure of ion sieves for efficient lithium extraction. Here, we have grafted sodium dodecyl sulfate (SDS) on H2TiO3 ion sieves to enhance its hydrophilicity, and simultaneously promoted the formation of porous structure for the ion sieves with the addition of aluminum chloride (AlCl3⋅6H2O) through the solid-phase method. The effects of SDS and Al co-modification on the hydrophilicity, morphology, structure, and adsorption properties of the H2TiO3 ion sieve have been systematically investigated. The modified ion sieve features a uniform and dense mesoporous structure with improved surface hydrophilicity, enhancing its lithium extraction capability and increasing its contact sites with Li+ in solution. As a result, the modified H2TiO3 ion sieves demonstrated efficient lithium extraction performance with the maximum adsorption capacity reached 64.4 mg/g, significantly outperforming the unmodified ion sieves (56.3 mg/g). Furthermore, the adsorption isotherms of Li+ on the SDS and Al co-modified titanium lithium ion sieve follow the Langmuir model, and the adsorption kinetics fit the pseudo-second-order model.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 14","pages":"3624 - 3634"},"PeriodicalIF":0.8,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147336852","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

Comparison of Ground and Excited States of [Ru(bpy)2(η2-tpy)]2+ (bpy = 2,2'-Bipyridine; tpy = Terpyridine) and Associated Protonation Chemistry [Ru(bpy)2(η -tpy)]2+ （bpy = 2,2'-联吡啶；tpy =三联吡啶）的基态和激发态及相关质子化化学的比较

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-02-04 DOI: 10.1134/S0036024425703327

Mohammad Aminur Rahman

{"title":"Comparison of Ground and Excited States of [Ru(bpy)2(η2-tpy)]2+ (bpy = 2,2'-Bipyridine; tpy = Terpyridine) and Associated Protonation Chemistry","authors":"Mohammad Aminur Rahman","doi":"10.1134/S0036024425703327","DOIUrl":"10.1134/S0036024425703327","url":null,"abstract":"Here, the ground and excited state dynamics of [Ru(bpy)2(η2-tpy)]2+ were studied. Protonation of the pendant pyridine ring of [Ru(bpy)2(η2-tpy)]2+ demonstrates that intra-ligand charge transfer (ILCT) occurs between the pendant pyridine and adjacent bpy ligand in the [Ru(bpy)2(η2-tpy)]2+ complex. The addition of trifluroacetic acid (TFA) results in slight spectral changes which have been assigned to the protonation of the pendant pyridine of [Ru(bpy)2(η2-tpy)]2+. The protonation of the pendant pyridine increases the lifetime from 0.082 ns to 2.6 ns. Mulliken-Hush analysis of the ILCT of [Ru(bpy)2(η2-tpy)]2+ has been done and compared with that of [Ru(bpy)3]2+. The value for the electronic coupling element (HDA) for [Ru(bpy)2(η2-tpyH+)]3+ suggests that the electronic coupling between bpy and the pendant pyridine is quite strong.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 14","pages":"3671 - 3681"},"PeriodicalIF":0.8,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147336853","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

Theoretical Study of the Cycloaddition Reaction Mechanisms of Cyclic Phosphenium Cation and Methyleneimine 环磷阳离子与亚胺环加成反应机理的理论研究

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-02-04 DOI: 10.1134/S0036024425703261

Xiaojun Tan

引用次数: 0

Adsorption of Paracetamol and Naproxen from Wastewater onto Activated Carbon from Avocado Waste: Experimental and DFT Study 牛油果废活性炭吸附废水中扑热息痛和萘普生的实验及DFT研究

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-02-04 DOI: 10.1134/S0036024425703303

Samer Alawaideh, Manal Alkhabbas, Gada Edris, Omar Alnasra, Mariam A Hamed, Ashraf Al-Msiedeen

{"title":"Adsorption of Paracetamol and Naproxen from Wastewater onto Activated Carbon from Avocado Waste: Experimental and DFT Study","authors":"Samer Alawaideh, Manal Alkhabbas, Gada Edris, Omar Alnasra, Mariam A Hamed, Ashraf Al-Msiedeen","doi":"10.1134/S0036024425703303","DOIUrl":"10.1134/S0036024425703303","url":null,"abstract":"Adsorption behavior of paracetamol (Par) and sodium naproxen (Nap) onto a low-cost activated carbon prepared from waste avocado peels (APAC) has been investigated. The surface characteristics of APAC were analyzed using SEM, XRD, and FT-IR techniques. Batch adsorption experiments were carried out to investigate the influence of various parameters, such as initial drug concentration, adsorbent dosage, contact time, temperature, and pH. The experimental data for Par and Nap were analyzed using various adsorption isotherm models. Par demonstrated a good fit with both the Langmuir and Freundlich models, while the Freundlich equation provided the best fit for Nap. The data revealed that the kinetics of both drugs followed a pseudo-second order model. The estimated thermodynamic parameters ΔH°, ΔS°, and ΔG° indicate that the adsorption of Par and Nap onto the activated carbon is an exothermic, spontaneous, and physical sorption process. Furthermore, density functional theory (DFT) calculations were employed to provide insights into the adsorption mechanism. This study concludes that waste avocado peels offer a viable and economical adsorbent for the effective removal of paracetamol and sodium naproxen from aqueous solutions.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 14","pages":"3647 - 3660"},"PeriodicalIF":0.8,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147336634","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

An Organic-Inorganic Hybrid One-Dimensional Perovskite Type [(CH2)3NH2S]CdCl3 with Dielectric Switching Behavior 具有介电开关性能的有机-无机杂化一维钙钛矿型[(CH2)3NH2S]CdCl3

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-02-04 DOI: 10.1134/S003602442570325X

Xiaodong Zhang

{"title":"An Organic-Inorganic Hybrid One-Dimensional Perovskite Type [(CH2)3NH2S]CdCl3 with Dielectric Switching Behavior","authors":"Xiaodong Zhang","doi":"10.1134/S003602442570325X","DOIUrl":"10.1134/S003602442570325X","url":null,"abstract":"Organic-inorganic hybrid materials show great application prospects in many fields such as sensors, intelligent switches and optoelectronics because of their adjustable structure and functional properties. An organic-inorganic hybrid one-dimensional perovskite type crystal [(CH2)3NH2S]CdCl3 ((CH2)3NH2S = thiazolidinium, 1) has been synthesized. A structural phase transition occurs at 219/209 K (cooling/heating). The structural analysis of single crystal at variable temperature shows that the kinetic change of c and the deformation of anionic framework contribute to the structural transformation. This order-disorder transition of thiazolidinium causes the dielectric state to shift between low and high dielectric states, making it a switchable dielectric material. In addition, the reversibility of the dielectric switch of the crystal under temperature stimulation was determined. Our research has promoted the research progress of novel five-membered heterocyclic organic-inorganic hybrid perovskites and provided a good platform for realizing switchable dielectric properties.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 14","pages":"3599 - 3604"},"PeriodicalIF":0.8,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147336854","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

Carbon Dioxide-Assisted Oxidative Dehydrogenation of Propane in the Presence of Chromium Oxide Catalysts in the Gas Phase and under Supercritical Conditions: Effect of Support and Process Parameters 超临界条件下氧化铬催化丙烷气相氧化脱氢：载体和工艺参数的影响

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-01-16 DOI: 10.1134/S0036024425702759

M. A. Tedeeva, M. Yu. Mashkin, A. A. Andresyuk, P. V. Pribytkov, M. A. Dzigoeva, V. L. Baiburskii, K. B. Kalmykov, S. F. Dunaev, A. L. Kustov

{"title":"Carbon Dioxide-Assisted Oxidative Dehydrogenation of Propane in the Presence of Chromium Oxide Catalysts in the Gas Phase and under Supercritical Conditions: Effect of Support and Process Parameters","authors":"M. A. Tedeeva, M. Yu. Mashkin, A. A. Andresyuk, P. V. Pribytkov, M. A. Dzigoeva, V. L. Baiburskii, K. B. Kalmykov, S. F. Dunaev, A. L. Kustov","doi":"10.1134/S0036024425702759","DOIUrl":"10.1134/S0036024425702759","url":null,"abstract":"The paper describes the synthesis and characterization of a set of chromium oxide catalyst systems that contain 5 wt % of chromium and are supported on various commercial supports: 5Cr/SiO2, 5Cr/Al2O3, 5Cr/Al2O3(Si), 5Cr/Al2O3(Ca,Mg), 5Cr/Al2O3(Si,Na), 5Cr/TiO2, 5Cr/ZrO2(W), 5Cr/ZrO2(Si), and 5Cr/ZrO2(La). The catalyst systems are studied by XRD, UV–Vis diffuse reflectance spectroscopy, and SEM–EPMA methods; all the samples are tested in the CO2-assisted oxidative dehydrogenation of propane. The catalyst system exhibiting the highest activity in the propane dehydrogenation reaction in the presence of CO2 in the gas phase is studied under supercritical conditions. The prospects for using high pressure in the studied reaction are shown.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 13","pages":"3257 - 3265"},"PeriodicalIF":0.8,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145983009","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

Study on the Separating of Cyclohexane + 1-Propanol Azeotrope System by Using Ionic Liquid Extractants 离子液体萃取剂分离环己烷+ 1-丙醇共沸体系的研究

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-01-16 DOI: 10.1134/S0036024425702814

Liu Xue-guo, Huang Yao-fei, Guo Yi-Xin, Li Huan-xin

引用次数: 0

Conformational Changes in Complexes of Two Homogeneous Polypeptides on the Surface of a Carbon Nanotube at Different pH Values 不同pH值下碳纳米管表面两种均质多肽配合物的构象变化

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-01-16 DOI: 10.1134/S0036024425702875

N. Yu. Kruchinin, M. G. Kucherenko

{"title":"Conformational Changes in Complexes of Two Homogeneous Polypeptides on the Surface of a Carbon Nanotube at Different pH Values","authors":"N. Yu. Kruchinin, M. G. Kucherenko","doi":"10.1134/S0036024425702875","DOIUrl":"10.1134/S0036024425702875","url":null,"abstract":"The conformational rearrangement of single or paired homogeneous polypeptide macromolecules of the same length, including those with different types of units, lying on the surface of a carbon nanotube were studied by molecular dynamics simulation at different pH levels. A mathematical model of macrochain conformations is presented, which allows for interactions in the complex of two similar polypeptides on the surface of the carbon nanotube, at different pH values of the solvent. When pH departed from the isoelectric point, the single polypeptide uncoiled and wound around the nanotube, while the two identical polypeptides repelled each other, shifting to the opposite ends of the nanotube. When two oppositely charged polypeptides were adsorbed on the surface of the carbon nanotube, they became tightly intertwined, forming a generally neutral polyelectrolyte complex. If the electric charge of one of the polypeptides in the complex did not change with a change in the pH level, while the electric charge of the other polypeptide decreased in magnitude, then the first polypeptide unfolded, dragging the second one along with it, and together they wound around the carbon nanotube.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 13","pages":"3381 - 3393"},"PeriodicalIF":0.8,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145983288","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

Kinetics and Mechanism of the Catalytic Hydroisomerization of n-Hexadecane in the Presence of a Pt/SAPO-11 Catalyst Pt/SAPO-11催化剂催化正十六烷加氢异构化的动力学和机理

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2026-01-16 DOI: 10.1134/S0036024425702747

K. F. Koledina, A. I. Malunov, R. Z. Zainullin, M. R. Agliullin, I. M. Gubaidullin, S. N. Koledin

{"title":"Kinetics and Mechanism of the Catalytic Hydroisomerization of n-Hexadecane in the Presence of a Pt/SAPO-11 Catalyst","authors":"K. F. Koledina, A. I. Malunov, R. Z. Zainullin, M. R. Agliullin, I. M. Gubaidullin, S. N. Koledin","doi":"10.1134/S0036024425702747","DOIUrl":"10.1134/S0036024425702747","url":null,"abstract":"A kinetic model of the catalytic hydroisomerization of n-hexadecane is developed. It is shown that the relevance of this process is attributed to the necessity to improve the low-temperature properties of diesel fuel and Group III and IV oils. The process is run for the selective isomerization of normal alkanes contained in the feedstock in the presence of a Pt/SAPO-11 catalyst based on platinum supported on SAPO-11 with a one-dimensional channel pore structure. The studies are conducted at temperatures of 300–360°C in increments of 20°C. Rate constants for the steps, preexponential factors, and activation energies for kinetic models for simplified and detailed n-hexadecane hydroisomerization schemes are calculated by solving the inverse kinetic problem. Numerical solution methods, in particular, the multistep variable-order Gear method and a genetic algorithm, are used. According to the calculated kinetic parameters, the dehydrogenation and protonation reactions that initiate the process are characterized by high activation energies. It is shown that an increase in temperature leads to an abrupt increase in the cracking rate relative to the isomerization rate.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 13","pages":"3249 - 3256"},"PeriodicalIF":0.8,"publicationDate":"2026-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145983328","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