Article
Nanoscience & Nanotechnology
Kaijia Li, Ruixuan Qin, Kunlong Liu, Wenting Zhou, Ning Liu, Yazhou Zhang, Shengjie Liu, Jie Chen, Gang Fu, Nanfeng Zheng
Summary: Treating Pt-based catalysts with CO at elevated temperature promotes the deposition of carbon species on the Pt surface, which inhibits dehalogenation reactions and enhances the hydrogenation activity of nitro groups. This treatment strategy effectively fabricates Pt-based catalysts on different supports for selective hydrogenation of a wide range of halogenated nitroaromatics.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Cristina Ruiz-Garcia, Miguel A. Gilarranz
Summary: Nitrogen-doped porous carbons were prepared using chitosan as a precursor, showing homogeneous nitrogen doping and a lamellar morphology. Catalysts with well-dispersed Pd nanoparticles were synthesized and tested for hydrodechlorination, demonstrating fast and total removal of 4-chlorophenol despite low metal content.
Article
Chemistry, Multidisciplinary
Xiaowen Chen, Zhimin Jia, Fei Huang, Jiangyong Diao, Hongyang Liu
Summary: Atomically dispersed metal catalysts (ADMCs), including single atom catalysts (SACs) and atomically dispersed clusters, show remarkable catalytic performance in reactions. Nanodiamond (ND) and its derivatives (NDDs) are promising supports for stabilizing highly active ADMCs. The tunable surface properties of NDDs enable ADMCs to exhibit unique selectivity and extended lifetime in reactions.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Jie He, Na Li, Zhi-Gang Li, Ming Zhong, Zi-Xuan Fu, Ming Liu, Jia-Cheng Yin, Zhurui Shen, Wei Li, Jijie Zhang, Ze Chang, Xian-He Bu
Summary: A versatile synthetic strategy was demonstrated to generate transition metal single-atom catalysts (M SAs/NC, M = Co, Cu, Mn) through defect engineering of metal-organic frameworks. By deliberately introducing structural defects within the MOF framework, the interatomic distance between metal sites was increased, inhibiting metal aggregation and resulting in a 70% increase in single metal atom yield. The optimized Co SAs/NC-800 showed superior activity and reusability for the selective hydrogenation of nitroarenes, surpassing several state-of-art non-noble-metal catalysts.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Engineering, Chemical
Hexin Jiang, Guanming Yuan, Zhengwei Cui, Zhepeng Zhao, Zhijun Dong, Jiang Zhang, Ye Cong, Xuanke Li
Summary: This study investigated the influence of different catalyst supports on nitrobenzene hydrogenation and found that the 10 wt % Ni/CB catalyst exhibited the best catalytic activity and selectivity. It had a higher turnover frequency and lower apparent activation energy compared to other catalysts, and it also demonstrated good recyclability and structural stability. This study demonstrates the superiority of porous carbon materials as catalyst supports over Al2O3 in nitrobenzene hydrogenation.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Timothy Zurrer, Kenneth Wong, Jonathan Horlyck, Emma C. Lovell, Joshua Wright, Nicholas M. Bedford, Zhaojun Han, Kang Liang, Jason Scott, Rose Amal
Summary: The study successfully dispersed Ni nanoclusters in the parent MOF using NiMg-MOF-74 as a template, and influenced CO2 adsorption capacity and hydrogenation selectivity by controlling the ratio of Ni to Mg during thermal treatment.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Jing Zhang, Weiqi Liao, Hao Zheng, Yunshang Zhang, Lebing Xia, Bo-Tao Teng, Ji-Qing Lu, Weixin Huang, Zhenhua Zhang
Summary: The effects of Pd catalysts supported on different exposed facets of anatase TiO2 nanocrystals on the hydrogenation of CO2 to formate were investigated. It was found that the 2%Pd/TiO2 {1 0 0} catalyst exhibited high activity and stability, with a high turnover frequency and stability. This can be attributed to the higher density of moderate basic sites and higher oxygen vacancy concentration on the TiO2 {1 0 0} surface, which promote the activation of CO2 and H-2, and the formation of stable Pd particles.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Applied
Nienke L. Visser, Juliette C. Verschoor, Luc C. J. Smulders, Francesco Mattarozzi, David J. Morgan, Johannes D. Meeldijk, Jessi E. S. van der Hoeven, Joseph A. Stewart, Bart D. Vandegehuchte, Petra E. de Jongh
Summary: The presence of oxygen- or nitrogen-containing surface groups on a graphite nanoplatelet support affects the performance of nickel-supported catalysts during CO2 hydrogenation. The interaction between the metal and support determines the availability of the metal surface. Introducing nitrogen-containing groups weakens the interaction but increases the initial activity, while using carbon with stable oxygen functional groups prevents deactivation due to particle growth. Small amounts of contaminants have a significant influence on CH4 selectivity at low conversions.
Article
Chemistry, Physical
Huiyu Zhang, Han Han, Linfei Xiao, Wei Wu
Summary: This study prepared a series of CoMoCx catalysts using ionic liquids as precursors and optimized the efficiency of CO2 hydrogenation to ethanol by adjusting the carburization temperature. The results showed high ethanol selectivity and yield under optimal reaction conditions.
Article
Chemistry, Physical
Farzeen Sakina, Carlos Fernandez-Ruiz, Jorge Bedia, Luisa Gomez-Sainero, Richard T. Baker
Summary: Ordered mesoporous carbon (OMC) was utilized as a support for palladium nanoparticles in catalysts for gas phase hydrodechlorination (HDC) of trichloromethane (TCM), showing excellent dispersion of fine Pd nanoparticles and high selectivity to higher hydrocarbons in two of the catalysts. However, the solid-liquid (SL) method resulted in larger particles and less uniform palladium distribution, leading to lower conversion, selectivity, and more severe catalyst deactivation at higher reaction temperatures.
Article
Chemistry, Physical
Jiadong Zhu, Diana Ciolca, Liang Liu, Alexander Parastaev, Nikolay Kosinov, Emiel J. M. Hensen
Summary: In this study, Cu-based catalysts were synthesized using different methods, with the addition of CeO2 found to enhance the CH3OH selectivity of Cu/ZnO-CeO2 catalysts. In situ IR spectroscopy revealed insights into the CO2 hydrogenation mechanism over Cu-Zn-Ce oxide catalysts.
Article
Materials Science, Multidisciplinary
David M. Parker, Alex J. Lineweaver, Arthur D. Quast, Ilya Zharov, Jennifer S. Shumaker-Parry
Summary: Surface-functionalized nanodiamond with thiol-termination has been successfully developed through treatment with elemental sulfur at high temperature, demonstrating the utility of thiols for conjugation of molecules to the diamond surface. Thiol-terminated diamond as a support for gold nanoparticles showed excellent stability and catalytic performance, highlighting the potential applications of such materials in nanotechnology and nanomedicine.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Chemistry, Physical
Pei Yuan, Xiaoqing Liao, Haishuai Cui, Fang Hao, Wei Xiong, He'an Luo, Yang Lv, Pingle Liu
Summary: In this work, defect-rich MOF-derived Ni@C catalysts were synthesized using a thermally decarboxylation-induced defect strategy for the hydrogenation of nitrocyclohexane (NCH). The strong metal-support interaction (SMSI) between defect-rich carbon and Ni promotes the dispersion and reduces the particle size of Ni nanoparticles, leading to outstanding catalytic activity. The in situ diffuse reflectance infrared Fourier transform spectroscopy (in situ DRIFTS) reveals the critical transformation path of nitrosocyclohexane (N-NCH) for achieving high selectivity to cyclohexanone oxime (CHO). Density functional theory (DFT) calculations confirm that SMSI between defect-rich carbon and Ni results in the formation of electron-deficient Ni with a lower d-band center, which enhances the adsorption of N-cyclohexylhydroxylamine (N-CHH) and cyclohexylamine (CHA), weakens the adsorption of N-NCH and CHO, and ultimately increases the selectivity to CHO. Under optimal conditions, Ni@DC-0.06 achieves 97.2% selectivity to CHO with 95.2% NCH conversion.
Article
Chemistry, Multidisciplinary
Yan Lv, Xueyan Wu, He Lin, Jiaxin Li, Hongbo Zhang, Jixi Guo, Dianzeng Jia, Hongmei Zhang
Summary: The carbon-supported metal nanocatalysts with well-designed graphdiyne layer decorated on the carbon nanotubes sidewalls exhibited excellent catalytic activity for efficient hydrogen generation and aromatic nitroreduction. The novel carbon support possessed excellent conductivity, abundant and uniform reactive sites, low redox potential, high specific surface area, and strong interaction with metal atomic clusters, making it a promising candidate for other metal-supported catalysts.
Article
Chemistry, Physical
Laurent Vanoye, Boris Guicheret, Camila Rivera-Carcamo, Jeremy Audevard, Javier Navarro-Ruiz, Iker del Rosal, Iann C. Gerber, Cristian H. Campos, Bruno Fernandes Machado, Jerome Volkman, Regis Philippe, Philippe Serp, Alain Favre-Reguillon
Summary: This study reports on the synthesis, characterization, and kinetic evaluation of two highly active Pd catalysts supported on different carbon supports. The activities of both catalysts were high due to the unique cooperative catalysis between Pd single atoms and nanoparticles. However, heat management during the reactor operation with these catalysts is crucial to avoid deactivation and thermal runaway.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Physical
E. Golubina, T. N. Rostovshchikova, E. S. Lokteva, K. Maslakov, S. A. Nikolaev, M. Shilina, S. A. Gurevich, V. M. Kozhevin, D. A. Yavsin, E. M. Slavinskaya
Summary: The study reveals that the surface coverage of alumina with Pt nanoparticles plays a crucial role in the efficiency of CO oxidation catalyst. Decreasing the number of Pt particle layers enhances the activity of CO oxidation, with Pt-0 dominating in multilayer catalysts.
APPLIED SURFACE SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Ekaterina S. Lokteva, Vera V. Shishova, Nikolay N. Tolkachev, Andrey N. Kharlanov, Konstantin I. Maslakov, Alexey O. Kamaev, Igor Yu. Kaplin, Irina N. Savina, Elena V. Golubina
Summary: By utilizing a mesoporous support based on silica and zirconia, monometallic and bimetallic catalysts were prepared and tested in the hydrodechlorination of 4-chlorophenol in aqueous solution. It was found that the bimetallic FePd/ZS catalyst exhibited excellent activity and stability, while the activation of Pd/ZS by aqueous phenol solution was identified through DRIFT spectroscopy analysis.
Article
Chemistry, Multidisciplinary
Igor Yu Kaplin, Ekaterina S. Lokteva, Svetlana Bataeva, Konstantin Maslakov, Alexander Fionov, Alexey Shumyantsev, Oksana Ya Isaikina, Alexey O. Kamaev, Elena Golubina
Summary: The study analyzed the effects of template nature and MnOx modification on the catalytic efficiency of Ce0.8Zr0.2O2 (CZ) catalysts in CO oxidation and soot oxidation. The results showed that CZ(SD) had better catalytic activity in CO oxidation than CZ(CTAB) due to its biomorphic texture and improved oxygen mobility, while CZ(SD) had lower efficiency in soot oxidation due to low surface reducibility. Despite differences in structure and interaction, Mn-modified catalysts exhibited similar catalytic properties, with enhanced performance in CO oxidation but worse performance in soot oxidation compared to CZ(CTAB).
PURE AND APPLIED CHEMISTRY
(2021)
Article
Chemistry, Physical
E. V. Golubina, E. S. Lokteva, A. V. Erokhin, V. Yu. Murzin, V. S. Chernikova, A. A. Veligzhanin
Summary: The study shows that the bimetallic catalyst NiZn/ND exhibits the highest selectivity in the hydrogenation reaction of phenylacetylene, while NiZn3/ND is less active and selective due to ZnO preventing the adsorption of phenylacetylene.
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Chemistry, Physical
T. N. Rostovshchikova, E. S. Lokteva, M. I. Shilina, E. V. Golubina, K. I. Maslakov, I. N. Krotova, A. A. Bryzhin, I. G. Tarkhanova, O. V. Udalova, V. M. Kozhevin, D. A. Yavsin, S. A. Gurevich
Summary: Laser electrodispersion (LED) is used to synthesize model catalysts and study the interaction between active metal particles, leading to the development of highly active catalysts. LED technology has broad applications in catalysis, with potential for studying processes like hydrodechlorination and oxidation reactions of carbon monoxide and methane.
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Biochemistry & Molecular Biology
Elena Golubina, Igor Yu Kaplin, Anastasia Gorodnova, Ekaterina S. Lokteva, Oksana Ya Isaikina, Konstantin Maslakov
Summary: A series of CrOx-ZrO2-SiO2 (CrZrSi) catalysts were prepared by a one-pot template-assisted evaporation-induced self-assembly process. The catalysts showed high activity and efficiency in non-oxidative propane dehydrogenation. Silica acted as both a textural promoter and a stabilizer in the catalysts.
Article
Chemistry, Physical
Igor Yu. Kaplin, Ekaterina S. S. Lokteva, Artem V. V. Tikhonov, Konstantin I. I. Maslakov, Oksana Ya. Isaikina, Elena V. V. Golubina
Summary: This study investigates the incorporation of copper into Ce-Sn and Ce-Zr oxide supports and tests the corresponding catalysts in the preferential oxidation of CO. The one-pot synthesized tin- and zirconium-doped catalysts show better performance than the impregnated ones. The analysis of catalyst structure and properties, as well as the discussion of copper distribution and interaction with oxide supports, provides insights into the catalyst performance.
Article
Chemistry, Physical
D. A. Ryaboshapka, E. S. Lokteva, E. V. Golubina, A. N. Kharlanov, K. I. Maslakov, A. O. Kamaev, A. V. Shumyantsev, I. A. Lipatova, E. I. Shkol'nikov
Summary: The study focuses on the physicochemical and catalytic properties of 6%Ni/Al2O3 catalysts in the gas-phase hydrodechlorination of chlorobenzene (CB) and examines the impact of heteropoly acid modification on the catalytic efficiency. It is found that modification of different types of alumina will affect the properties of the catalysts, highlighting the importance of understanding the impact of support modification on catalytic performance in hydrodechlorination reactions.
KINETICS AND CATALYSIS
(2021)