Article
Chemistry, Applied
Byeongju Song, Jeongmyeong Kim, Iljun Chung, Yongju Yun
Summary: The catalytic properties of Pt catalysts supported on mesoporous silica were studied in the enantio-selective hydrogenation of ethyl pyruvate. The results showed that the pore structure and size of the m-SiO2 supports significantly influenced both the activity and enantioselectivity. The use of specific modifiers and H-2 pressure further improved the performance of the catalysts.
Article
Nanoscience & Nanotechnology
Nataliia Marchenko, Lise-Marie Lacroix, Nicolas Ratel-Ramond, Walter Leitner, Alexis Bordet, Simon Tricard
Summary: In this study, iron-platinum nanoparticles with tunable Fe/Pt ratios were immobilized on an imidazolium-based supported ionic liquid phase (SILP) and utilized as catalysts. The Fe/Pt ratio was found to have a significant influence on the oxidation state of Fe and the observed activity and selectivity in catalysis. By adjusting the Fe/Pt ratio, different hydrogenation activities and selectivities towards aromatic hydrocarbons and ketones could be achieved.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Marlene Fuhrer, Tomas van Haasterecht, Johannes Hendrik Bitter
Summary: This study demonstrates the potential of carbon supported Mo and W carbides to replace Pt in the hydrogenation of cinnamaldehyde. Although the carbide catalysts are less active than Pt, both the carbides and Pt exhibit selectivity towards C=C hydrogenation, with the carbides also producing beta-methylstyrene.
CHEMICAL COMMUNICATIONS
(2022)
Article
Thermodynamics
Ahmed A. Askalany, Kutub Uddin, Bidyut B. Saha, Muhammad Sultan, Giulio Santori
Summary: This study presents a new method for experimental investigation of water adsorption kinetics using silica-supported ionic liquid, and predicts its performance in water desalination through modeling. The results suggest a promising future for this material in water desalination applications.
Article
Chemistry, Multidisciplinary
Fanxiang Meng, Lu Wang, Haijun Yan, Meng Zhang, Jide Wang, Ling Zhao, Chao Yang, Ronglan Wu
Summary: A new bismuth-based catalyst was prepared using halloysite nanotubes as a carrier and effectively used for acetylene hydrochlorination. The proposed Bi/HNT catalyst showed promising catalytic performance. Loss of active species (Bi species) and accumulation of carbon deposition on the surface are the main reasons for the deactivation of the Bi/HNT catalyst.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Jin-Tao Du, Hao Niu, Hao Wu, Xiao-Fei Zeng, Jie-Xin Wang, Jian-Feng Chen
Summary: Poly(N-vinyl-2-pyrrolidone) (PVP)-protected platinum nanoparticles supported on gamma-methacryloxypropyltrimethoxysilane (gamma-MPS) modified silica spheres (Pt-PVP/SiO2(M)) exhibit high catalytic activity for the hydrolysis of ammonia borane (AB), with small size, uniform dispersion, and low activation energy. The synergistic effect between the modifier of silica spheres and the capping agent of metal nanoparticles contributes to the higher loading amount and turnover frequency (TOF) values compared to counterparts without gamma-MPS and PVP.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Review
Materials Science, Ceramics
A. Rex, J. H. Z. dos Santos
Summary: This article discusses the use of sol-gel processes in various applications such as dry methane reforming, hydrogenation, hydrolysis, oxidation, photocatalysis, and polymerization. The most commonly used route is base-catalyzed sol-gel, which results in spherical and compact encapsulated catalysts. New methods using mild conditions for oxidation via enzymes and yeast cells are also reported. Nonhydrolytic routes are still relevant for the encapsulation of metallocenes. Silica encapsulation enables a broad range of applications for supported catalysts.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Review
Biochemistry & Molecular Biology
Anna Wolny, Anna Chrobok
Summary: Supported ionic liquid phases offer several advantages in catalysis, providing catalytic activity or efficient matrix and improving mass transport. Silica-based materials, due to their cost-efficiency and specific properties, are widely used in this field.
Article
Chemistry, Physical
Letisha Naicker, Markus Schoerner, Daniel Kremitzl, Holger B. Friedrich, Marco Haumann, Peter Wasserscheid
Summary: This work demonstrates the influence of selected ionic liquids on the catalytic performance of a Cu/Al2O3 catalyst in the hydrogenation of citral. The coated Cu-SCILL catalysts exhibit improved selectivity towards desired products and increased conversion rates.
Review
Chemistry, Multidisciplinary
Min Zhang, Jing-He Yang
Summary: This review highlights the research progress of mono-metal and bimetallic catalysts supported on mesoporous silica materials for the hydrogenation of furfural to various high value-added chemicals in gas or liquid phase. Feasible suggestions to improve catalyst activity and product selectivity are also proposed.
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, Inorganic & Nuclear
Samahe Sadjadi, Fatemeh Koohestani
Summary: Cl-functionalized halloysite nanoclay was modified to prepare a hybrid catalyst for the hydrogenation of nitro compounds. The catalyst showed high selectivity towards the hydrogenation of nitro group and could produce high yields of hydrogenated products at ambient temperature and low pressure. Recycling experiments demonstrated that the catalyst could maintain its activity with slight Pd leaching.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Engineering, Chemical
Xiang-Rui Zeng, Lu-Lu Wang, Ji-Lin Wang
Summary: The biodiesel was successfully synthesized by transesterification of soybean oil and methanol using a silica-supported morpholine alkaline ionic liquid catalyst at ambient temperature. The catalyst showed good reusability without significant decrease in catalytic activity, with a high yield of biodiesel obtained under optimal reaction conditions.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Peng Yin, Shan-Cheng Shen, Le-Le Zhang, Xu-Sheng Zheng, Ming Zuo, Yan-Wei Ding, Hai-Wei Liang
Summary: This study demonstrates a high-temperature SMSI between platinum and sulfur-doped carbon (S-C) supports, which helps suppress platinum sintering and enhance the stability and electrocatalytic performance of Pt/S-C catalysts.
CELL REPORTS PHYSICAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Maodi Wang, Qihua Yang
Summary: The modulation of the microenvironment of active sites using porous materials enriched with organic functional groups can solve the trade-off problem between activity and selectivity in selective hydrogenation with supported metal catalysts. The enrichment, oriented adsorption and activation of substrates induced by non-covalent interactions determine the hydrogenation activity and selectivity.
Review
Chemistry, Multidisciplinary
Marcileia Zanatta, Nathalia M. Simon, Jairton Dupont
Article
Engineering, Environmental
Jonathan Albo, Muhammad I. Qadir, Mario Samperi, Jesum Alves Fernandes, Imanol de Pedro, Jairton Dupont
Summary: The study achieved continuous conversion of CO2 into methanol using Cu nanoparticles synthesized in TiO2 photocatalyst in an optofluidic microreactor, outperforming previous Cu/TiO2-based systems and common CO2 photoreactors.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Alexander J. Kibler, Virginia S. Souza, Jesum Alves Fernandes, William Lewis, Stephen P. Argent, Jairton Dupont, Graham N. Newton
Summary: In this study, an organic-inorganic hybrid species based on the Wells-Dawson polyoxotungstate and novel fluorescent benzothiadiazole-imidazolium cations has been synthesized. X-ray crystallographic analysis revealed a hydrogen-bonded superstructure between the inorganic and organic components, with non-equivalent cations showing varying degrees of rotation between the BTD and imidazolium rings. UV-vis diffuse reflectance spectra indicated a band gap of 3.13 eV, while solid-state fluorescence properties suggested electron transfer between the inorganic and organic components.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Physical
Muhammad Qadir, Daniel L. Baptista, Jairton Dupont
Summary: This study demonstrates that ruthenium nanoparticles decorated on TiO2 nanomaterials with different morphologies show high efficiency and selectivity for the allylic oxidation of cycloalkenes. The Ru/TiO2 nanofibers display the highest activity, while Ru/TiO2 nanoparticles and nanotubes also exhibit good conversion rates. The catalytic efficiency of Ru/TiO2 nanomaterials is higher compared to Ru NPs and TiO2 nanomaterials individually, indicating a positive synergistic effect. The results suggest that the crystalline structure, pore volume, and surface area of the supports play a role in determining the activity of Ru/TiO2 NPs and NFs.
Article
Chemistry, Physical
Michele O. Vieira, Wesley F. Monteiro, Thuany M. Ferreira, Josiel B. Domingos, Jairton Dupont, Francisco P. dos Santos, Jackson D. Scholten
Summary: Surface active ionic liquids, particularly dicationic ILs, have attracted interest for their sustainable catalytic and extraction properties. The anion plays a crucial role in modulating the ILs' properties in solution, with some ILs showing superior ionic organization.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Michael Nazarkovsky, Bozena Czech, Alicja Zmudka, Viktor M. Bogatyrov, Olena Artiushenko, Vladimir Zaitsev, Tatiana D. Saint-Pierre, Rafael C. Rocha, Jiang Kai, Yutao Xing, Wellington D. G. Goncalves, Amanda G. Veiga, Maria Luiza M. Rocco, Syed Hamza Safeer, Mariia Galaburda, Victor Carozo, Ricardo Q. Aucelio, Richard J. Caraballo-Vivas, Olena Oranska, Jairton Dupont
Summary: Novel colorized zinc oxide-nanosilica composites were synthesized and analyzed, showing a direct correlation between ZnO concentration and color/optical properties. The most active sample had a higher ZnO concentration and exhibited significant visible light absorbance and luminescence. XPS studies revealed the formation of nanocomposites and impurities in ZnO that contributed to the optical and catalytic behavior, confirming the potential for wastewater detoxification.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Daiane Kessler Fischer, Karina Rodrigues de Fraga, Carla Weber Scheeren
Summary: In this study, TiO2 nanoparticles doped with Cu2+ and Fe3+ were synthesized using 1-n-butyl-3-methylimidazolium tetrafluoroborate (BMI center dot BF4) ionic liquid. The new photocatalysts exhibited high catalytic activity in phenol photodegradation under UV/visible radiation, with 1% Cu2+-doped TiO2 NPs showing 99.9% degradation and 1% Fe3+-doped TiO2 NPs showing 96.8% degradation. Industrial wastewater from the tobacco industry was also evaluated, with 56.7% phenol photodegradation observed.
Article
Chemistry, Physical
Muhammad Qadir, Jonathan Albo, Imanol de Pedro, Miroslav Cieslar, Ignacio Hernandez, Philipp Bruener, Thomas Grehl, Marcus Castegnaro, Jonder Morais, Paulo R. Martins, Cristiane G. Silva, Muhammad Nisar, Jairton Dupont
Summary: Efficient and robust photocatalysts have been developed by combining bimetallic CuNi nanoparticles and TiO2. The CuNi NPs decorated TiO2 significantly promote the generation of CH3OH and syngas under visible light irradiation, achieving high yields and quantum efficiency.
MOLECULAR CATALYSIS
(2022)
Review
Chemistry, Multidisciplinary
Pedro Migowski, Pedro Lozano, Jairton Dupont
Summary: 1,3-Dialkyl imidazolium salts are versatile ionic liquids (ILs) that can function as solvents, supports, or modifiers for catalytic processes. They can modify the properties of catalysts and control the access of substrates and expulsion of products. The miscibility, hydrophobicity, ionicity, and basicity of ILs can be adjusted by choosing the appropriate alkyl side chain and anions, allowing fine-tuning of the catalytic system. ILs also offer the possibility of designing greener catalytic tools and various methods for product separation.
Review
Chemistry, Multidisciplinary
Muhammad I. Qadir, Jairton Dupont
Summary: Ionic liquids (ILs) are potential materials for capturing and converting CO2 to energy-adducts. They create a confined space around catalysts, controlling the diffusion of reactants, intermediates, and products through their hydrophobicity and contact ion pairs. By combining ILs with semiconductors, the electronic properties of the catalysts can be modulated to facilitate CO2 activation and increase photoreduction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Vinicius K. Tomazett, Gustavo Chacon, Graciane Marin, Marcus V. Castegnaro, Rafael P. das Chagas, Luciano M. Liao, Jairton Dupont, Muhammad I. Qadir
Summary: Chemical fixation of CO2 to epoxides is an efficient and environmentally friendly approach to produce cyclic carbonates. By using the n-butyl-3-methylimidazulim trichlorozincate (BMIm.ZnCl3) ionic liquid as catalyst, high conversion rates (56-95%) of different aromatic and aliphatic epoxides were achieved under ambient reaction conditions. The activity of the catalyst was further enhanced by supporting the IL on SiO2, resulting in a maximum conversion and yield (99%) of cyclic carbonates at higher reaction conditions. The reaction mechanism was found to involve strong hydrogen bonding between the epoxide oxygen and the C2-H of the imidazolium cation, with the ZnCl3 anion acting as a nucleophile to facilitate ring opening without dissociation.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Chemistry, Physical
Muhammad I. Qadir, Marcus V. Castegnaro, Felipe F. Selau, Daniel L. Baptista, Gustavo Chacon, Renato B. Pontes, Allan M. Lisboa, Dario Eberhardt, Jairton Dupont
Summary: Reducing atmospheric CO2 is a major challenge due to increased industrial activities and its contribution to global warming. One effective approach is converting CO2 into C1 feedstocks like formic acid (FA). Ruthenium clusters and nanoparticles prepared by magnetron sputtering in different supported ionic liquid phases (SILPs) showed high efficiency in producing free FA. DFT calculations supported the hydrogenation of HCO3* to FA as the mechanistic approach.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Materials Science, Multidisciplinary
Niqab Khan, Rogerio Nunes Wolff, Hameed Ullah, Gustavo J. Chacon, Washington Santa Rosa, Jairton Dupont, Renato Vitalino Goncalves, Sherdil Khan
Summary: A dopant-free synthesis approach is presented to control the electronic structure of a semiconductor. BiVO4 synthesized using ionic liquids (ILs) showed improved photocatalytic performance, although it had a higher defect density and chemisorption compared to the conventional hydrothermal process.
MATERIALS ADVANCES
(2022)
Article
Chemistry, Multidisciplinary
Emerson C. Kohlrausch, Roberto dos Reis, Rhys W. Lodge, Isabel Vicente, Alexandre G. Brolo, Jairton Dupont, Jesum Alves Fernandes, Marcos J. L. Santos
Summary: The presence of a specific fraction of {112} facets on the TiO2 surface is found to be the key limiting step for anatase-to-rutile phase transition, instead of the crystallite size. This discovery allows for controlling the phase transition over a wide range of temperatures by suppressing the formation of {112} facets on anatase particles using specific concentrations of fluorinated ionic liquid during TiO2 synthesis.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Multidisciplinary
Gabriel Abarca, Wellington D. G. Goncalves, Brunno L. Albuquerque, Jairton Dupont, Martin H. G. Prechtl, Jackson D. Scholten
Summary: Bimetallic RuPd nanoparticles immobilized in ionic liquids showed high catalytic activity for the selective hydrogenation of benzene and phenol, producing cyclohexane and cyclohexanol. The activity and selectivity are dependent on the ratio of Ru to Pd in the bimetallic nanoparticles.
NEW JOURNAL OF CHEMISTRY
(2021)
