Article
Chemistry, Physical
Fuli Wen, Jin Zhang, Zhiyang Chen, Ziqiao Zhou, Hongchao Liu, Wenliang Zhu, Zhongmin Liu
Summary: Methane can be effectively activated via carbonylation with CO over Zn/HZSM-5 catalysts under mild conditions, leading to high selectivity to aromatics or ethane. The study demonstrates the potential for transforming methane into value-added chemicals under mild reaction conditions.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Fubo Gu, Xuetao Qin, Liu Pang, Ri Zhang, Mi Peng, Yao Xu, Song Hong, Jinglin Xie, Meng Wang, Dongmei Han, Dequan Xiao, Guangsheng Guo, Xiayan Wang, Zhihua Wang, Ding Ma
Summary: Direct oxidation of methane into value-added liquid chemicals utilizing rhodium dispersed on ZSM-5 catalysts under mild conditions shows high selectivity and efficiency. Increasing acidity over the catalyst improves methane conversion and formic acid selectivity, with activation of C-H bonds even at room temperature.
Article
Chemistry, Multidisciplinary
Florian Zand, Suzanne J. T. Hangx, Christopher J. Spiers, Peter J. van den Brink, James Burns, Matthew G. Boebinger, Jonathan D. Poplawsky, Matteo Monai, Bert M. Weckhuysen
Summary: Understanding and controlling the structure and composition of nanoparticles in supported metal catalysts are crucial for improving chemical processes. Atom probe tomography (APT) is a powerful tool for three-dimensional chemical imaging of materials with nanometer resolution. However, APT has not been used for mesoporous oxide-supported metal catalysts due to sample fracture. In this study, we developed a high-pressure resin impregnation strategy to overcome this issue and successfully applied APT to high-porous supported Pd-Ni catalyst materials active in CO2 hydrogenation. Our results demonstrate the capability of APT to quantitatively assess the size, composition, and metal distribution of nanoparticles in industrial catalysts.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Applied
Zixiao Liu, Sichao Cheng, Emily Schulman, Weiqi Chen, Dionisios G. Vlachos, Yuying Shu, Dat T. Tran, Dongxia Liu
Summary: This study prepared a vitreous silica-supported iron (Fe/SiO2-V) catalyst by fusion of quartz silica and fayalite, and investigated its physicochemical properties and performance in direct non-oxidative methane coupling (NMC). Compared to cristobalite support, the vitreous silica support with disordered Si-O bonds and structural defects enabled better iron dispersion and more vital metal-support interaction. The Fe/SiO2-V catalyst exhibited a shorter induction period in methane activation and produced less coke during NMC.
Article
Chemistry, Applied
Natalia Kolesnichenko, Tatiana I. Batova, Anton N. Stashenko, Tatiana K. Obukhova, Evgeny Khramov, Alexey A. Sadovnikov, Denis E. Zavelev
Summary: This article investigates the catalytic properties of single atom rhodium catalysts based on microporous ZSM-5 zeolite in the reaction of oxidative methane carbonylation to acetic acid. The results suggest that rhodium exists as single atom metal sites in the zeolite structure and the spatial arrangement of rhodium atoms influences the formation of acetic acid.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Chemistry, Applied
Pedro Nothaft Romano, Jose Faustino Souza de Carvalho Filho, Joao Monnerat Araujo Ribeiro de Almeida, Eduardo Falabella Sousa-Aguiar
Summary: A series of mono and bimetallic catalysts based on Ni, Rh, and Pd supported on different materials were evaluated for the dry reforming of methane reaction. Ni-based catalysts suffered from deactivation but could be regenerated, while Pd-based catalysts deactivated due to coke deposition. Rh-based catalysts showed remarkable activity and stability.
Article
Chemistry, Multidisciplinary
Haifeng Chen, Huifeng Yue, Chen Zhu, Magnus Rueping
Summary: This study describes a nickel-catalyzed three-component reductive carbonylation reaction for the synthesis of aryl-alkyl ketones. Ethyl chloroformate is used as a safe and readily available source of CO, providing an efficient and practical alternative. Experimental and mechanistic studies provide insight into the complexity and sequence of the reaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Chen -Wei Wang, Yuan Sun, Li-Jun Wang, Wen-Hua Feng, Yu -Ting Miao, Ming -Ming Yu, Yu-Xuan Wang, Xu-Dong Gao, Qingqing Zhao, Zhiqin Ding, Zhaochi Feng, Si-Min Yu, Jinhui Yang, Yongfeng Hu, Jian-Feng Wu
Summary: Herein, we report a direct co-conversion of methane, carbon monoxide, and hydrogen peroxide into acetic acid, catalyzed by Fe/ZSM-5 (0.25) zeolite under mild conditions, achieving a high acetic acid yield with optimal selectivity. C-13-Tracking experiments revealed the origin of methyl and carbonyl groups in acetic acid. Spin-trapping experiments indicated the involvement of center dot OH and center dot CH3 radicals. In situ Raman analysis suggested a potential intermediate -Fe-OCH3 species. Overall, our method is greener and more economical, showing potential as an industrial alternative.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Ning Liu, Xianqing Wu, Chenglong Wang, Jingping Qu, Yifeng Chen
Summary: A nickel-catalyzed alkoxycarbonylation reaction of aromatic iodides with alcohols under atmospheric pressure of carbon monoxide is demonstrated. This operationally simple protocol enables the facile synthesis of (hetero)aromatic esters, showing broad substrate scope and excellent functional group tolerance. Various primary and secondary aliphatic alcohols as well as phenols are suitable for this transformation.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Organic
Ruiting Yang, Qiumin Xie, Qian Yan, Xiuli Zhang, Bao Gao
Summary: A novel approach for synthesizing thioesters using S-aryl thioformates as sources was reported, showing smooth transfer of the thioester moiety to aryl iodides. The reaction can be conducted at ambient temperature and tolerates a variety of substrates, with moderate to excellent yields. The scalability of this method was demonstrated through a gram-scale reaction with little change in chemical yield.
Article
Chemistry, Organic
Ruiting Yang, Qiumin Xie, Qian Yan, Xiuli Zhang, Bao Gao
Summary: A novel method for synthesizing thioesters using S-aryl thioformates as sources has been reported. The reaction achieved desirable yields of thioesters with various substrates under mild conditions. Gram-scale synthesis was also successful using this method.
Article
Engineering, Chemical
Linghui Lyu, Jing Zhang, Qingxiang Ma, Shengene Makpal, Xinhua Gao, Hui Fan, Jianli Zhang, Jian Sun, Tian-sheng Zhao
Summary: The study prepared Fe-doped Ni/Al2O3 catalysts with bimodal-pore structure using the EISA method, which demonstrated improved stability and activity in the DRM reaction. The long-term stability of the catalytic reaction was tested, showing promising results for the development of DRM catalytic systems.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Physical
Savannah J. Turner, Dennie F. L. Wezendonk, Robert J. A. M. Terorde, Krijn P. de Jong
Summary: In situ transmission electron microscopy technique provides insights into nanoscale processes during particle growth of supported metal catalysts. Nickel nanoparticles from a nickel phyllosilicate catalyst precursor were observed to rapidly grow to a final size of 3.5-7 nm within 3-4 minutes under specific conditions. Most of the particles were immobile, but some exhibited sintering behavior without significant size increase. The results support the hypothesis that the size of the nickel species' origin determines the particle size.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Emily K. Schroeder, Jordan Finzel, Phillip Christopher
Summary: “UV photon illumination can induce CO desorption from Rh(CO)2 species supported on Al2O3 and produce Rh(CO), promoting the reaction rates. The photolysis process is influenced by temperature and interactions between Rh(CO)x species and hydrated regions of the support.”
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Energy & Fuels
Shican Jiang, Weixiao Ding, Kun Zhao, Zhen Huang, Guoqiang Wei, Yanyan Feng, Yijv Lv, Fang He
Summary: This study successfully utilized Na-doped LaMnO3 as redox catalysts to convert methane into C-2 products, achieving higher performance in oxidative coupling reaction. The incorporation of Na enhanced the redox properties of the catalyst, promoting the formation of C-2 hydrocarbons, with 019Na-LaMnO3 demonstrating the best results among all samples.
Article
Engineering, Chemical
Alexey A. Zhokh, Andrey I. Trypolskyi, Valentina I. Gritsenko, Tamila G. Serebrii, Peter E. Strizhak
Summary: The prepared H-ZSM-5/alumina catalysts exhibit high ethylene selectivity and ethylene/propylene ratio, while zeolite H-ZSM-5 shows higher propylene selectivity. Embedding microporous zeolite in mesoporous alumina matrix improves catalyst lifetime, reduces mass transfer limitations, and decreases the number of strong acid sites.
CHEMICAL ENGINEERING COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Yevhen Kalishyn, Igor Bychko, Tetyana Kameneva, Olexander Skoblik, Yevhen Polunkin, Peter Strizhak
Summary: The study demonstrates that α-FeOOH nanoparticles exhibit significant inhibition on the oxidation of benzyl alcohol by reacting with peroxyl radicals, suggesting their potential as additives to protect organic compounds from oxidation and enhance the storage properties of fuel. This inhibition efficiency may lead to new applications of iron-containing nanoscale materials.
JOURNAL OF CLUSTER SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Vladyslav V. V. Subotin, Bohdan V. V. Vashchenko, Vitalii M. M. Asaula, Eduard V. V. Verner, Mykyta O. O. Ivanytsya, Oleksiy Shvets, Eugeniy N. N. Ostapchuk, Oleksandr O. O. Grygorenko, Sergey V. V. Ryabukhin, Dmitriy M. M. Volochnyuk, Sergey V. V. Kolotilov
Summary: A series of Pd-containing composites were prepared using modified deposition methods, and their catalytic performance in the hydrogenation of diene carboxylates was evaluated. It was found that composites with Pd nanoparticles of 5-40 nm size exhibited the highest efficiency in diene hydrogenation.
Article
Chemistry, Physical
Lixiu Zhang, Haihang Wang, Mengyao Chen, Qinglin Tang, Jie Hu, Yao Wang, Linjun Huang, Shichao Wang, Dong Zhao, Peter Strizhak, Jianguo Tang
Summary: In this study, unzipped carbon nanotubes (uCNTs) and drilled carbon nanotubes (dCNTs) were prepared and anchored with Eu3+ complexes to form stable tenon structures. The results showed that Eu-dCNTs significantly improved the mechanical properties of EP, with a 161% increase in ultimate tensile strength and a 226% increase in flexural strength. The drilling treatment and tenon structure of Eu-dCNTs played a key role in enhancing the mechanical properties of EP.
Article
Chemistry, Multidisciplinary
M. M. Kurmach, A. O. Samotoi, S. O. Sotnik, P. S. Yaremov, O. V. Shvets, N. D. Scherban
Summary: A series of ZrAl- and SnAl-silicate hierarchical zeolites of the BEA structural type were synthesized by hydrothermal method. Their acidic and catalytic properties in the reaction of cyclohexanone oxidation with hydrogen peroxide were investigated. For SnAl-BEA zeolites, the conversion of cyclohexanone into epsilon-caprolactone increases as the tin content and the concentration of Lewis acid sites increase, while for ZrAl-BEA zeolites, the maximum conversion (80%) is achieved at 1.33 mole % Zr.
THEORETICAL AND EXPERIMENTAL CHEMISTRY
(2023)
Article
Physics, Mathematical
Alexey Zhokh, Peter Strizhak
Summary: This study investigates the time-fractional diffusion equation coupled with a first-order irreversible reaction using integral transforms. Green's functions are derived for short and long times through approximations of the Mittag-Leffler function. The crossover point between short- and long-time asymptotic is presented explicitly. The exact analytic asymptotic solutions of the time-fractional reaction-diffusion equation are obtained based on the developed Green's functions. The applicability of these solutions is demonstrated through quantification of reaction-diffusion kinetics during heterogeneous catalytic chitin conversion to chitosan.
ADVANCES IN MATHEMATICAL PHYSICS
(2023)
Article
Chemistry, Physical
Igor Bychko, Anastasiia Bazylevska, Vyacheslav Khavrus, Jianguo Tang, Peter Strizhak
Summary: A series of carbon-encapsulated Ni nanoparticles deposited on carbon nanotubes (Ni@CNT) were prepared using a simple impregnation method and characterized by physicochemical methods. The catalytic performance of Ni@CNT was found to be strongly influenced by the Ni concentration, with samples containing 1% Ni showing the highest activity in model reactions. The study demonstrates that the facile fabrication of Ni@CNT produces efficient catalysts for the hydrogenation of organic compounds using molecular hydrogen, with the catalytic properties primarily associated with the carbon surface and enhanced by the Schwab effect.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
G. R. Kosmambetova, N. V. Vlasenko, L. B. Kharkova, O. H. Yanko, V. M. Ogenko, V. I. Grytsenko, O. V. Shvets
Summary: The deposition of Rh-CD onto SiO2, Al2O3, and ZrO2 oxide supports enhances the catalytic activity in glycerol conversion. The reaction system produces acrolein and acetaldehyde as oxygen-containing products. It is observed that the use of a support with a smaller specific surface area leads to an increased yield of reaction products, which is attributed to the higher surface concentration of acid sites.
THEORETICAL AND EXPERIMENTAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Nina V. V. Vlasenko, Peter E. E. Strizhak
Summary: The glycerol oligomerization reaction in a liquid phase was investigated using acid-base bifunctional catalysts of TiO2, ZrO2, CeO2, binary CeO2-ZrO2 systems, and purely basic oxide MgO. The phase composition and surface area were determined by XRD and BET, while the acidity and basicity of the catalysts were characterized using quasi-equilibrium thermal desorption (QE-TD) of NH3 and CO2. Attenuated total reflectance FTIR (ATR-FTIR) spectroscopy provided qualitative insights into the interactions between the oxide and glycerol. A comparison of the catalytic and acid-base properties of the oxide systems revealed that both acid and base sites are required for the reaction to occur, with the strength of the base sites exceeding that of the acid sites.
Article
Chemistry, Multidisciplinary
I. B. Bychko, G. R. Kosmambetova, Ye. Yu. Kalishyn, V. O. Khavrus, V. I. Gritsenko, P. E. Strizhak
Summary: This study investigated the water-gas shift reaction (WGSR) using a 3%FeOx/CNT catalyst prepared by depositing iron nanoparticles on carbon nanotubes (CNT). The catalyst's characteristics before and after WGSR were analyzed using various methods, confirming its structural stability during the reaction. The 3%FeOx/CNT catalyst exhibited high catalytic activity and long-term stability over a wide range of steam/CO ratios. The findings demonstrate the promising potential of nanocomposites of iron and carbon nanomaterials as catalysts for WGSR.
REACTION CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
M. M. Kurmach, K. M. Konysheva, O. P. Pertko, P. S. Yaremov, Yu. G. Voloshyna, O. V. Shvets
Summary: The H-forms of hierarchical aluminosilicate zeolites MOR, BEA, and MFI demonstrate catalytic activity in n-hexane cracking, but the introduction of nickel nanoparticles with an average size of 2.3-5.5 nm changes the reaction direction towards isomerization. This opens up prospects for catalysts based on Ni-containing zeolites in the hydroisomerization reaction of linear hydrocarbons.
THEORETICAL AND EXPERIMENTAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Nina V. Vlasenko, Olena I. Yanushevska, Olga Z. Didenko, Peter E. Strizhak
Summary: The possibility of using sulfated and carbon nanotube modified titania as catalysts for glycerol oligomerization has been investigated. It was found that the sulfated titania samples showed high activity in glycerol conversion, while the addition of carbon nanotubes reduced the conversion and yield but increased the selectivity for short-chain glycerides.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Mykhailo Kurmach, Pavlo Yaremov, Oleksiy Shvets
Summary: The catalytic activity of Cs-ion-exchange form of aluminosilicate zeolites with MOR and BEA topology, with morphology of aggregated nanosheets, nanorods, or close to spherical nanoparticles, was evaluated in Gewald reaction. The results showed that morphology and zeolite topology significantly influenced the amount of Cs incorporated and its catalytic activity in the reaction.
MATERIALS TODAY-PROCEEDINGS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Oleksiy Shvets, Mykhailo Kurmach, Pavlo Yaremov, Nataliya Shcherban
Summary: Template-containing borosilicate hierarchical zeolites with MTW and BEA topology were used as catalysts for the cycloaddition reaction of styrene epoxides and carbon dioxide to synthesize cyclic carbonates. The catalysts exhibited high catalytic activity and selectivity, and the optimization of the concentration of available ammonium groups and ion replacement further improved the conversion and selectivity of the reaction.
MATERIALS TODAY-PROCEEDINGS
(2022)
Article
Chemistry, Multidisciplinary
M. M. Kurmach, K. M. Konysheva, K. O. Filatova, S. O. Sotnik, K. S. Gavrilenko, O. Andreev, O. Shvets
Summary: A method is proposed for obtaining hierarchical zeolites and nanocomposites by partial recrystallization of perlite and obsidian in the presence of polyquaternary ammonium salts as structure-directing agents. The obtained materials have a developed specific surface, presence of Lewis and Bronsted acid sites, and exhibit catalytic activity in a specific reaction.
THEORETICAL AND EXPERIMENTAL CHEMISTRY
(2022)
