Article
Chemistry, Multidisciplinary
Si Chen, Xiaohui Huang, Dieter Schild, Di Wang, Christian Kuebel, Silke Behrens
Summary: Intermetallic Pd-In nanoparticles were synthesized in ionic liquids using a novel and facile approach. The structure of the nanoparticles obtained under different reaction conditions was confirmed. These stabilized nanoparticles showed high activity and selectivity as catalysts. This research provides insights for the synthesis of intermetallic nanoparticles and the design of bimetallic catalysts.
Article
Chemistry, Applied
Fawei Lin, Xiao Jiang, Nuttakorn Boreriboon, Chunshan Song, Zhihua Wang, Kefa Cen
Summary: Binary supports such as TiO2-CeO2 and TiO2-ZrO2 significantly enhance CH3OH formation and selectivity, with Pd-Cu/Ti0.1Zr0.9O2 exhibiting the best catalytic performance. Lowering temperature further enhances CH3OH selectivity.
Article
Chemistry, Applied
Misael Cordoba, Lina Garcia, Luciana Martinez Bovier, Juan Badano, Carolina Betti, Fernando Coloma Pascual, Monica Quiroga, Cecilia Lederhos
Summary: In this study, the impregnation order of metals on different supports was found to affect the catalytic performance of low loaded Pd and Ni bimetallic catalysts. The synthesized catalysts exhibited high activity and selectivity in selective hydrogenation and purification reactions, and the order of metal impregnation played a role in modifying the catalysts' properties. The observation of different adsorbed species on the bimetallic surface during the reaction was important for achieving high selectivity.
TOPICS IN CATALYSIS
(2022)
Article
Engineering, Chemical
Georgios Uzunidis, Silke Behrens
Summary: The preparation of bimetallic Pd/Ag-based model catalysts aims to study the promotional effects of Ag doping in the liquid-phase semi-hydrogenation of diphenylacetylene. The precursor concept is used to synthesize colloidal bimetallic Pd/Ag nanoparticles, which are then utilized as well-defined building units for catalyst preparation. This approach enables independent tuning of the composition of the nanoparticles with the co-localization of the two metals to a fine extent. The size and composition of the nanoparticles remain unchanged after immobilization on a carbon support.
CHEMIE INGENIEUR TECHNIK
(2022)
Article
Chemistry, Physical
Hao Shen, Yunzhe Wang, Tanmoy Chakraborty, Guangye Zhou, Canhui Wang, Xianbiao Fu, Yuxuan Wang, Jinyi Zhang, Chenyang Li, Fei Xu, Liang Cao, Tim Mueller, Chao Wang
Summary: This study reports the selective reduction of CO to acetate using Cu-Pd bimetallic electrocatalysts and explores the underlying mechanism. The results demonstrate that the bimetallic catalyst exhibits high activity and selectivity for the conversion of CO to acetate.
Article
Chemistry, Physical
Yamei Xu, Ziluo Ding, Rui Qiu, Ruijun Hou
Summary: Metal-support interaction and catalyst pretreatment play a crucial role in industrial catalysis. This study investigated the effect of different supports (SiO2, CeO2, TiO2, and ZrO2) on a Cu-Pd catalyst with a high Cu/Pd ratio, and compared the reduction temperatures of 350°C and 550°C. The results showed that the reduction temperature significantly influenced the surface reconstruction and phase transition of the catalyst, and led to variations in catalytic performance. Among the investigated catalysts, Zr-350 exhibited the highest methanol yield.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Christine Dietrich, Si Chen, Georgios Uzunidis, Martin Haehsler, Yannick Traeutlein, Silke Behrens
Summary: The use of ionic liquids as reaction medium allows for the preparation of bimetallic Pd/Sn-based nanoparticles with tunable composition and structure. The reaction parameters and temperature have an impact on nanoparticle formation and composition, which can be determined by X-ray diffraction and transmission electron microscopy. With an additional annealing step at 200 degrees C, single-phase products are formed, and these nanocrystals show enhanced catalytic properties in semi-hydrogenation reactions.
Article
Chemistry, Physical
Yao Sheng, Baoqin Wu, Jiaan Ren, Xueguang Wang, Xiujing Zou, Xionggang Lu
Summary: In this study, silica supported N-doped carbon layers encapsulating Co-Cu nanoparticles were prepared, and it was found that Co1C0.30@CN/SiO2 with a Cu/Co molar ratio of 0.30:1 exhibited higher catalytic activity and stability. The addition of Cu facilitated the formation of highly active Co-N sites and N-doped carbon layer, which could protect Co from oxidation. Mechanistic studies revealed that the interaction effect between Co and Cu atoms enhanced the selectivity during chemoselective hydrogenation of halogenated nitroarenes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
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, Physical
Rui Qiu, Ziluo Ding, Yamei Xu, Qiuchen Yang, Kening Sun, Ruijun Hou
Summary: The study investigated the surface and catalytic properties of a Cu-Pd bimetallic catalyst with a high Cu/Pd ratio for CO2 hydrogenation, comparing it with monometallic catalysts. The interactions between Cu and Pd were found to improve dispersion and reduction properties, with both geometric and electronic effects present in the bimetallic catalyst. The catalytic performance was similar between Cu/SiO2 and CuPd/SiO2 when normalized to surface Cu sites, with CuPd/SiO2 showing enhanced activity mainly due to geometric effects.
APPLIED SURFACE SCIENCE
(2021)
Article
Energy & Fuels
Hao Zhao, Xiaoqing Liao, Haishuai Cui, Meichen Zhu, Fang Hao, Wei Xiong, Hean Luo, Yang Lv, Pingle Liu
Summary: In this study, a series of layered double hydroxides (LDH) derived CunCo1/MgAlOx catalysts with different metal ratios were prepared and applied in the efficient conversion of furfural to furfuryl alcohol. The synergistic interaction between Cu and Co significantly enhanced the catalyst activity and facilitated the formation of Cu2O, which acted as a Lewis acid site to polarize the carbonyl group (C = O) and promote the formation of furfuryl alcohol.
Article
Chemistry, Applied
Nora Jannsen, Cornelia Pribbenow, Carmen Selle, Hans-Joachim Drexler, Marc-Andre Mueller, Jonathan A. Medlock, Werner Bonrath, Detlef Heller
Summary: An efficient and highly selective semi-hydrogenation of terminal alkynes to alkenes has been achieved using neutral dimeric rhodium(I) complexes. The results show excellent selectivity and no deactivation or reduction in selectivity, indicating the potential industrial application of homogeneous rhodium complexes in the semi-hydrogenation of terminal alkynes.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Chemistry, Physical
Leandro De Castro, Dia Sahsah, Andreas Heyden, John Regalbuto, Christopher Williams
Summary: This contribution explores the synthesis of silica-supported dilute limit alloy (DLA) of palladium on copper using strong electrostatic adsorption (SEA). The catalysts were characterized and the nature and structure of the isolated Pd sites on Cu were determined. The study also discussed the potential of the SEA approach for producing DLAs and the utility of the combined FTIR/DFT approach for their characterization.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Jianfeng Li, Wenli Suo, Yuena Huang, Minglin Chen, Haowen Ma, Chuang Liu, Huan Zhang, Kun Liang, Zhengping Dong
Summary: In this study, high-surface-area mesoporous α-Al2O3 supported PdCu bimetallic nanoparticles were successfully prepared by using a porous organic framework as the template. The obtained catalyst exhibited high selectivity and catalytic activity in the selective hydrogenation reaction, and maintained its catalytic activity after multiple cycles.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Energy & Fuels
Fatima Jalid, Tuhin Suvra Khan, M. Ali Haider
Summary: By employing first principles theoretical analysis and microkinetic modelling, bimetallic alloy catalysts of cobalt, palladium, and copper have been designed for CO2 assisted ethane dehydrogenation reaction. Through in silico simulations, certain alloy catalysts have been identified that can maintain high ethane and CO2 conversion rates, increase ethylene yield, and reduce coke formation, making them potential candidates for experimental testing and scale-up studies.
Article
Chemistry, Applied
Kseniya Arsenyeva, Anastasiya Klimashevskaya, Kira Pashanova, Olesya Yu Trofimova, Maxim G. Chegerev, Alyona A. Starikova, Anton Cherkasov, Georgy K. Fukin, Ilya A. Yakushev, Alexandr Piskunov
Summary: A stable O,N-heterocyclic stannylene was synthesized and characterized, and its reactivity towards various iron carbonyl compounds was studied. The compound demonstrated striking catalytic activity in the hydroboration reactions of benzaldehydes.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Physical
M. A. Panafidin, A. V. Bukhtiyarov, I. P. Prosvirin, I. A. Chetyrin, A. Yu Klyushin, A. Knop-Gericke, N. S. Smirnova, P. V. Markov, I. S. Mashkovsky, Y. V. Zubavichus, A. Yu. Stakheev, V. I. Bukhtiyarov
Summary: This study investigates the formation and modification of intermetallic Pd-In particles under controlled conditions through oxidative treatments. It was found that prolonged exposure to air led to partial decomposition of the particles, with subsequent surface segregation of indium and formation of indium oxide. Further temperature increase resulted in the surface localization of the indium oxide component.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Inorganic & Nuclear
I. A. Yakushev, M. A. Dyuzheva, I. A. Stebletsova, A. B. Kornev, N. V. Cherkashina, M. N. Vargaftik
Summary: In this study, a series of heterometallic palladium(II) complexes with ferrocenecarboxylic acid were synthesized and structurally characterized for the first time. The displacement of acetate anions by ferrocenecarboxylate anions during the synthesis process was observed.
RUSSIAN JOURNAL OF COORDINATION CHEMISTRY
(2022)
Article
Chemistry, Physical
A. V. Bukhtiyarov, M. A. Panafidin, I. P. Prosvirin, N. S. Smirnova, P. V. Markov, G. N. Baeva, I. S. Mashkovsky, G. O. Bragina, C. Rameshan, E. Yu. Gerasimov, Y. V. Zubavichus, V. I. Bukhtiyarov, A. Yu. Stakheev
Summary: A bimetallic PdIn/Al2O3 catalyst was prepared and characterized, and its activity and selectivity changes in the diphenylacetylene hydrogenation were investigated. It was found that oxidative treatment modified the catalyst active sites structure, leading to a decrease in selectivity, but this effect was reversible and reproducible. This catalyst is of great significance for balancing activity and selectivity.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Organic
D. A. Bokarev, G. N. Baeva, A. V. Kazakov, A. I. Mytareva, A. Yu. Stakheev
Summary: The study explores the potential of promoting V2O5/Al2O3 catalysts for NH3-SCR of nitrogen oxides. It was found that low-V2O5 (2-4 wt %) catalysts can have significantly enhanced activity (3-4 times) when promoted with tungsten oxide. It was demonstrated that a promoted V-W/Al2O3 catalyst with 4 wt % V2O5 achieves a NOx decomposition efficiency of 90% or higher in the range of 360-500 degrees C at a GHSV above 100,000 h(-1).
PETROLEUM CHEMISTRY
(2023)
Article
Chemistry, Applied
Alina I. Mytareva, Sergey A. Kanaev, Dmitriy A. Bokarev, Alexander V. Kazakov, Galina N. Baeva, Alexander Yu. Stakheev
Summary: A series of Ag/Al2O3 catalysts with different Ag loading were synthesized and characterized. It was found that the catalysts exhibited different structures and morphologies depending on the Ag loading. The catalytic performance of the catalysts in CO oxidation reactions was investigated, and it was observed that conventional CO oxidation mainly occurred on Ag-n clusters, while O-3-assited CO oxidation required the presence of Ag+ species.
TOPICS IN CATALYSIS
(2023)
Article
Chemistry, Applied
Alina I. Mytareva, Sergey A. Kanaev, Dmitriy A. Bokarev, Galina N. Baeva, Alexander Yu. Stakheev
Summary: A dual-zone catalytic system 10%Mn/Al2O3||10%Ag/Al2O3 has been developed for low temperature oxidation of light alkanes in the presence of ozone. The upstream bed (10%Mn/Al2O3) is responsible for ozone catalytic oxidation (OZCO) of the alkanes, while the downstream bed (10%Ag/Al2O3) effectively removes carbon monoxide and decomposes O-3-slip. The system demonstrates long-term effective removal of hydrocarbons at 100 degrees C.
TOPICS IN CATALYSIS
(2023)
Article
Polymer Science
Yury A. Belousov, Mikhail T. Metlin, Darya A. Metlina, Mikhail A. Kiskin, Ilya A. Yakushev, Trofim A. Polikovskiy, Ilya V. Taydakov, Andrei A. Drozdov, Fabio Marchetti, Claudio Pettinari
Summary: A new strategy for the easy polymerization of anionic [Ln(Q(cy))(4)](-) into two-dimensional layers of [AgLn(Q(cy))(4)](n) is proposed by binding the single molecular anions [Ln(Q(cy))(4)](-) to silver cations through coordination. The luminescent properties of [AgLn(Q(cy))(4)](n) have been studied, and it was found that LMCT quenching is effectively suppressed in the heterometallic [AgEu(Q(cy))(4)](n) polymer, explaining the low PLQY in [Eu(Q(cy))(4)](-). Sensibilization coefficients for H3O[Eu(Q(cy))(4)], [AgEu(Q(cy))(4)](n), and H3O[Sm(Q(cy))(4)] complexes were estimated via theoretical analysis and PLQY measurements.
Article
Chemistry, Inorganic & Nuclear
Pavel V. Markov, Galina O. Bragina, Nadezhda S. Smirnova, Galina N. Baeva, Igor S. Mashkovsky, Evgeny Y. Gerasimov, Andrey V. Bukhtiyarov, Yan. V. Zubavichus, Alexander Y. Stakheev
Summary: The effect of support on the performance of Pd1Ag10/Al2O3 and Pd1Ag10/CeO2-ZrO2 catalysts in the selective hydrogenation of diphenylacetylene (DPA) was investigated. The use of CeO2-ZrO2 as a carrier increased the activity of the Pd1Ag10 catalyst by three times without sacrificing selectivity compared to Pd1Ag10/Al2O3. The high selectivity of Pd1Ag10/CeO2-ZrO2 can be attributed to the stability of the structure of isolated Pd-1 sites on the surface of SAA Pd1Ag10/CeO2-ZrO2.
Article
Chemistry, Multidisciplinary
Stanislav I. Bezzubov, Ilya A. Yakushev, Alexander G. Medvedev, Petr V. Prikhodchenko, Andrei V. Churakov
Summary: A novel class of crystalline hydrogen peroxide adducts was prepared and their structures were determined by X-ray crystallography. The study found that hydrogen bonding plays a predominant role in crystal packing and influences valent S-O distances. A comparative analysis of the HOOH center dot center dot center dot O hydrogen bond strength was performed.
CRYSTAL GROWTH & DESIGN
(2023)
Review
Chemistry, Multidisciplinary
Igor S. Mashkovsky, Pavel V. Markov, Alexander V. Rassolov, Ekaterina D. Patil, Alexander Yu. Stakheev
Summary: This review addresses the development and application of the methodology of single-atom catalysts, ranging from single-site to single-atom alloy systems. The preparation and characterization of single-atom catalysts are discussed, along with their use in key catalytic reactions. Additionally, the possibility of fine tuning the surface structure of single-atom alloy catalytic systems using adsorbate-induced segregation is analyzed for the first time.
RUSSIAN CHEMICAL REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Arina Maleeva, Irina Ershova, Olesya Yu Trofimova, Kseniya Arsenyeva, Ilya A. Yakushev, Alexandr Piskunov
Summary: In this study, Gallium (III) catecholates with bipyridine ligands were synthesized and characterized using single-crystal X-ray diffraction. The near-infrared ligand-to-ligand charge transfer of the pentacoordinate complex was observed.
MENDELEEV COMMUNICATIONS
(2022)
