Article
Chemistry, Physical
Chandan Chaudhari, Katsutoshi Sato, Shin-ichiro Miyahara, Tomokazu Yamamoto, Takaaki Toriyama, Syo Matsumura, Kohei Kusuda, Hiroshi Kitagawa, Katsutoshi Nagaoka
Summary: Supported Ru catalysts prepared from different Ru precursors were used for the hydrogenation of benzaldehyde, resulting in high yield of benzyl alcohol. The catalyst exhibited moderate acidic and basic nature, which was favorable for controlling the selectivity of benzyl alcohol. Highly dispersed Ru nanoparticles showed effective performance for the hydrogenation of benzaldehyde. The Ru-CO/HT catalyst demonstrated good tolerance towards different functional groups and maintained stability until the 7th recycling cycle.
Article
Chemistry, Multidisciplinary
Jiajuan Li, Zizhu Wang, Yirui Ma, Caiyun Xu, Shenghu Zhou
Summary: In this study, mesoporous silica SBA-16-supported NiCo bimetallic nanocatalysts were synthesized and confirmed through various characterization techniques. The synthesized NiCo/SBA-16 showed enhanced catalytic performance for the hydrogenation of nitroaromatics. The improved catalytic performance was attributed to the formation of NiCo bimetallic nanostructures, where the synergistic effect between Ni and Co enhanced their catalytic activities.
Review
Chemistry, Inorganic & Nuclear
Hugo Valdes, Juan M. German-Acacio, Gerard van Koten, David Morales-Morales
Summary: This study explores the synthesis and applications of bimetallic complexes by merging a metallocene and a (cyclopentadienyl/aryl) pincer metal complex, discussing their importance in tuning electronic properties, catalytic reactions, and chiral catalysis. Various approaches to merge metallocene and pincer-metal motifs are explored, showcasing the potential for creating diastereomerically pure derivatives through post-functionalization strategies. The authors aim to inspire further research in this field by highlighting the synthetic, physico-chemical properties, and remarkable catalytic activities of metallocene-based pincer-metal complexes.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Physical
Wei Jiang, Jing-Pei Cao, Chen Zhu, Ming Zhao, Zhong-Hai Ni, Xiao-Yan Zhao, Jin-Xuan Xie, Liang Zhao, Yun-Peng Zhao, Hong-Cun Bai
Summary: This study investigates Ru-based catalysts for the selective hydrogenation of lignin-derived aromatic compounds and finds that Ru/alpha-Al2O3 catalyst exhibits excellent recyclability, air stability, and the highest activity. The mechanism of selective hydrogenation is revealed by experimental and theoretical calculations.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Annemieke Janssen, Veronica Pawlik, Alexander D. von Rueden, Lang Xu, Chenxiao Wang, Manos Mavrikakis, Younan Xia
Summary: This study reports a method for synthesizing Ru@Pd core-shell nanocrystals with polymorphism and reveals that the polymorphism depends on the thickness of the Pd shell. The injection rate serves as an experimental knob for controlling the phase, with Ru@Pd-hcp nanocrystals outperforming Ru@Pd-fcc in catalytic reactions. Density functional theory calculations are used to explain the enhancement in performance.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yang Jiang, Qian Li, Xi Li, Xinyi Wang, Sen Dong, Jianhua Li, Li Hou, Tifeng Jiao, Yatao Wang, Faming Gao
Summary: This study successfully prepared three-dimensional network Pd-Ni bimetallic catalysts, which exhibited high conversion rate and selectivity for the hydrogenation of nitrobenzene at low temperature and normal pressure. The catalysts showed significant catalytic efficiency and recyclability even after 10 cycles, providing important theoretical basis and technical support for the preparation of low-cost, highly efficient catalysts.
Review
Chemistry, Physical
Maximilian Koy, Peter Bellotti, Mowpriya Das, Frank Glorius
Summary: This review discusses the use of N-heterocyclic carbenes as molecular modifiers for metal surfaces, aiming to improve the reactivity of metal-based heterogeneous catalysts. Combining sophisticated ligand systems from homogeneous catalysis with metal surfaces can enhance parameters such as stability and selectivity of catalysts.
Article
Chemistry, Multidisciplinary
Antonio Madureira, Sebastien Noel, Bastien Leger, Anne Ponchel, Eric Monflier
Summary: The hydrogenation of vegetable oil-derived compounds using ion-exchange resin-supported ruthenium nanoparticles has been achieved for the first time. These catalysts show high efficiency, low metal loading, and excellent recyclability, and exhibit remarkable catalytic activity.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Christian Cerezo-Navarrete, Irene Mustieles Marin, Hector Garcia-Miquel, Avelino Corma, Bruno Chaudret, Luis M. Martinez-Prieto
Summary: This study reports the reduction of biomass-derived oxygenated compounds in water through magnetically induced catalysis. Non-coated and carbon-coated core-shell FeCo@Ni magnetic nanoparticles were used as both the heating agent and the catalyst. The product distribution could be controlled by adjusting the field amplitude during the magnetic catalysis. Furthermore, encapsulating the magnetic nanoparticles in carbon greatly improved the stability of the magnetic catalyst in solution, allowing for multiple reuses.
Article
Chemistry, Multidisciplinary
Unnati Gupta, R. Krishnapriya, Rakesh K. Sharma
Summary: A new type of Pd nanoparticle-intercalated montmorillonite clay catalyst has been reported for the hydrogenation of 3-diphenyl prop-2-en-1-imine. The catalyst showed significant catalytic activity and selectivity under 5 bar pressure and a shorter reaction time. This developed catalytic system exhibited excellent reusability over five cycles, paving the way for industrial applications.
Article
Chemistry, Physical
Aili Wang, Dejian Yu, Hengbo Yin, Wei Yuan
Summary: Bimetallic CuxAgy nanoparticles were successfully prepared and showed improved catalytic activity due to the interaction between Ag and Cu components.
Article
Nanoscience & Nanotechnology
Adam Prekob, Gabor Muranszky, Milan Szori, Gabor Karacs, Ferenc Kristaly, Tibor Ferenczi, Bela Fiser, Bela Viskolcz, Laszlo Vanyorek
Summary: Carbon black-supported palladium-platinum catalysts were prepared with and without nickel(II) oxide or iron(III) oxide promoter materials using ultrasonic cavitation technology. The one-step catalyst preparation method without the need for post-treatments showed excellent catalytic activity in the hydrogenation of nitrobenzene, with no significant differences in selectivity and aniline yield observed even when promoters were present.
Article
Chemistry, Multidisciplinary
Jia Yu, Weiming Chen, Kaixuan Li, Chunhui Zhang, Mingzhu Li, Feng He, Lei Jiang, Yuliang Li, Weiguo Song, Changyan Cao
Summary: GDY can serve as a wettability modifier to enhance hydrogenation catalysis, and the modified catalyst shows improved performance in gas-liquid-solid tri-phase reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Jeremy Audevard, Javier Navarro-Ruiz, Vincent Bernardin, Regis Philippe, Anna Corrias, Yann Tison, Alain Favre-Reguillon, Iker Del Rosal, Iann C. Gerber, Philippe Serp
Summary: Achieving high selectivity, conversion, and rate in the industrially important selective hydrogenation of a,b-unsaturated aldehydes is challenging. Previous approaches have sacrificed activity for selectivity towards unsaturated alcohol or saturated aldehyde. However, this study demonstrates that combining Ni nanoparticles (NiNP) and Ru single atoms (RuSA) on CNTs allows for improved hydrocinnamaldehyde selectivity without compromising activity. The resulting catalyst shows 94% selectivity at 99% conversion and has good stability in continuous flow conditions. Insights into the cooperative catalysis mechanism between NiNP and RuSA were obtained through density functional theory calculations.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Neha Choudhary, Viresh Kumar, Shaikh M. Mobin
Summary: This study demonstrates the use of bimetallic CoNi nanoflowers as catalysts for the hydrogenation of terminal alkynes, showing high conversion and recyclability. Various analytical techniques were used to analyze the structure and morphology, proposing a transfer hydrogenation mechanism involving diimide formation.
Article
Chemistry, Organic
V. A. Yarchak, L. A. Kulikov, A. L. Maximov, E. A. Karakhanov
Summary: Porous aromatic framework PAF-30 was modified by introducing complexing groups to synthesize catalyst supports PAF-30-dpa-Mo, PAF-30-dpcl-Mo, and PAF-30-AA-Mo. Various analytical methods were used to characterize the materials, and the catalytic activity was tested in the epoxidation of cyclohexene, 1-hexene, 1-octene, and styrene. The reusability of the catalysts was assessed using cyclohexene epoxidation.
PETROLEUM CHEMISTRY
(2023)
Article
Chemistry, Physical
Evgeny R. Naranov, Alexey A. Sadovnikov, Olga V. Arapova, Aram L. Bugaev, Oleg A. Usoltsev, Dmitry N. Gorbunov, Vincenzo Russo, Dmitry Yu. Murzin, Anton L. Maximov
Summary: The conversion of guaiacol and diphenyl ether with high selectivity towards hydrocarbons was achieved using a ruthenium oxide-based catalyst on a micro-mesoporous support. The acidity of the support played a crucial role in the deoxygenation process, while the catalyst surface influenced the hydrogenation of bulk molecules. The micro-mesoporous RuO2/ZM catalyst showed the best catalytic performance.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Mariyam Mukhtarova, Maria Golubeva, Alexey Sadovnikov, Anton Maximov
Summary: This paper investigates the development of catalysts for the hydrodeoxygenation of guaiacol, a lignin-derived compound. In situ-generated bulk molybdenum and tungsten oxides were studied as catalysts and their activity was analyzed under various reaction conditions. Molybdenum oxide showed higher activity in the partial and full hydrodeoxygenation of guaiacol, while tungsten oxide exhibited greater selectivity to aromatics.
Article
Chemistry, Multidisciplinary
A. L. Maximov, A. V. Zolotukhina, E. R. Naranov
Summary: A water-soluble catalyst based on ruthenium(0) nanoparticles stabilized with a copolymer of β-cyclodextrin and epichlorohydrin was synthesized and characterized. The catalyst showed activity in the hydrogenation of aromatic and unsaturated compounds, phenols, levulinic acid and its esters. The activity of the catalyst depended on the polarity and size of the substrate, and the β-cyclodextrin moieties acted as protecting groups.
RUSSIAN CHEMICAL BULLETIN
(2023)
Article
Polymer Science
Maria Golubeva, Mariyam Mukhtarova, Alexey Sadovnikov, Anton Maximov
Summary: The annual production of plastic waste is a serious environmental problem, causing significant pollution. This paper proposes recycling polyethylene terephthalate waste bottles into benzene-toluene-xylene fraction using a nickel phosphide catalyst formed during the recycling process. The catalyst was characterized and shown to contain a Ni2P phase. Its activity was studied at various temperatures and pressures, with the highest selectivity at 93%.
Article
Engineering, Chemical
Oleg Golubev, Anton Maximov
Summary: The problem of CO2 waste in the atmosphere is a major concern, and methods of CO2 utilization are being currently developed. In this study, a plasma-catalytic process is used to dissociate CO2. A series of catalysts containing MgO and CeO2 were synthesized, and their properties were characterized. It was found that the catalyst surface, composition, and phase content remained unchanged under dielectric barrier discharge conditions. The excellent catalytic activity of the MgCe-Al sample was attributed to the combination of weak basic sites and oxygen vacancies on the catalyst surface.
Review
Chemistry, Multidisciplinary
Maxim N. Temnikov, Ilya N. Krizhanovskiy, Anton A. Anisimov, Stanislav P. Bedenko, Konstantin I. Dementiev, Irina V. Krylova, Sergey A. Milenin, Anton L. Maksimov, Mikhail P. Egorov, Aziz M. Muzafarov
Summary: This review examines the current state of direct synthesis of alkoxysilanes (DSA), highlighting the main approaches, challenges, and prospects. The plausible reaction mechanism is considered, along with influential factors such as temperature, catalyst type and concentration, promoter additives, and method of carrying out the process. The bibliography includes 232 references.
RUSSIAN CHEMICAL REVIEWS
(2023)
Article
Chemistry, Organic
S. A. Svidersky, O. S. Dement'eva, M. I. Ivantsov, A. A. Grabchak, M. V. Kulikova, A. L. Maximov
Summary: The study investigates the hydrogenation of CO2 using catalysts supported on biochar. Bimetallic iron-cobalt catalysts were found to have better catalytic performance compared to monometallic iron and cobalt catalysts. The optimal performance was achieved with an iron to cobalt ratio of 3:1. The composition and genesis of the active phase in the bimetallic catalyst were identified, and a CO2 hydrogenation mechanism was proposed for the iron-dominated bimetallic catalyst. The use of biochar as a support was found to promote the formation of an active phase favorable for CO2 hydrogenation.
PETROLEUM CHEMISTRY
(2023)
Correction
Chemistry, Organic
V. A. Yarchak, L. A. Kulikov, A. L. Maximov, E. A. Karakhanov
PETROLEUM CHEMISTRY
(2023)
Article
Energy & Fuels
A. N. Karpov, V. V. Fadeev, K. B. Rudyak, A. L. Maksimov, A. V. Tarasov, E. V. Dutlov, P. S. Ivanov, D. V. Borisanov
Summary: This study demonstrates the relationship between mercaptan content in straight-run jet fuel and the operation conditions of column C-1 in the primary oil refining plant. Increasing the temperature at the bottom of column C-1 leads to the decomposition of unstable sulfur compounds, resulting in the removal of mercaptans and hydrogen sulfide with the gasoline fraction in column C-1. This reduces the mercaptan content in straight-run kerosene. A comparison of mercaptan contents in narrow oil fractions and straight-run jet fuel reveals that the latter has higher mercaptan content, which can originate from both the oil itself and the decomposition of unstable sulfur compounds, primarily disulfides.
CHEMISTRY AND TECHNOLOGY OF FUELS AND OILS
(2023)
Review
Chemistry, Organic
N. N. Petrukhina, A. L. Maximov
Summary: The prospects of using DME for oil recovery are analyzed based on laboratory and mathematical modeling results. The mechanism and influential factors of DME injection for oil extraction and recovery are discussed. The benefits of injecting DME prior to hydrocarbon gases and carbon dioxide are revealed. Combined technologies involving DME, carbon dioxide, polymer solutions, and steam are analyzed for enhancing oil recovery. The possibility of using DME for oily sludge separation is briefly discussed.
PETROLEUM CHEMISTRY
(2023)
Article
Biochemistry & Molecular Biology
Vadim Samoilov, Vladimir Lavrentev, Madina Sultanova, Dzhamalutdin Ramazanov, Andrey Kozhevnikov, Georgiy Shandryuk, Mariia Kniazeva, Anton Maximov
Summary: The study investigates the potential use of lower alkyl ethers of glycerol as components for low-melting technical fluids. The aqueous solutions of glycerol ethers were found to have a wide temperature range of usability (-114 to 150 degrees C) and exhibited higher efficiency in low-temperature applications compared to glycerol- or propylene glycol-based fluids due to their lower viscosities and favorable environmental properties.
Article
Chemistry, Organic
A. F. Ziniatullina, T. S. Kuchinskaya, M. I. Knyazeva, A. L. Maximov
Summary: The effect of quinoline additions and amount of the sulfiding agent added on the activity of the in situ prepared NiWS catalyst in naphthalene hydrogenation was studied. The catalyst shows high activity (>95% naphthalene conversion) in the presence of 1 wt % quinoline. Increasing the amount of the sulfiding agent leads to a decrease in selectivity with respect to decalins.
PETROLEUM CHEMISTRY
(2023)
Article
Chemistry, Physical
Gleb Zasypalov, Anna Vutolkina, Vladimir Klimovsky, Egor Abramov, Vladimir Vinokurov, Aleksandr Glotov
Summary: Halloysite nanotubes (HNTs) show promise as a support material for liquid-phase hydrodeoxygenation (HDO) catalysts. Acid etching can enhance their properties and increase catalytic activity and selectivity.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Biochemistry & Molecular Biology
Evgeniya Vlasova, Yiheng Zhao, Irina Danilova, Pavel Aleksandrov, Ivan Shamanaev, Alexey Nuzhdin, Evgeniy Suprun, Vera Pakharukova, Dmitriy Tsaplin, Anton Maksimov, Galina Bukhtiyarova
Summary: A series of bifunctional catalysts were synthesized for the hydroconversion of methyl palmitate. The MoS2/Al2O3-ZSM-22 catalyst demonstrated the highest yield of iso-alkanes among the tested catalysts.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
