Article
Chemistry, Applied
Siming Ding, Yuanyuan Kong, Yuichi Manaka, Wang-Jae Chun, Ikuyoshi Tomita, Ken Motokura
Summary: The use of water as a reaction solvent is ideal for green chemistry, but carrying out catalytic reactions with transition metal catalysts in aqueous media is challenging. To enhance the scope of allylation reactions in water, a series of Pd diphosphine complexes co-immobilized with organic groups onto mesoporous silica supports was synthesized. The newly synthesized catalyst demonstrated improved catalytic allylation performance in water, expanding the toolkit of transition-metal-catalyzed reactions in aqueous media. The results have far-reaching consequences in academia and industry due to the wide use and scope of allylation reaction.
Review
Chemistry, Physical
Negin Farhadian, Shiquan Liu, Anvar Asadi, Mohsen Shahlaei, Sajad Moradi
Summary: Fenton reactions, classified as homogeneous and heterogeneous, are efficient processes used in water remediation. Heterogeneous Fenton processes, using solid catalysts containing iron instead of dissolved iron, have shown higher catalytic activity compared to unsupported iron oxides. Iron-containing silica composites have been widely used for the removal of organic pollutants from aqueous solutions.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Biochemistry & Molecular Biology
Chiao-Fan Chiu, Jinn-Hsuan Ho, Eskedar Tessema, Yijing Lu, Chia-Rui Shen, Chang-Wei Lin, Norman Lu
Summary: Homogeneous catalysts with short fluorous chains were synthesized and used in the catalysis of alkynes' hydrosilylation. The thermomorphic mode was effectively used for catalyst recovery. The reduced fluorine content in the new catalyst is considered an important discovery in fluorous technology field.
Article
Chemistry, Inorganic & Nuclear
Digvijay Sah, Javaid Shabir, Surabhi, Padmini Gupta, Subho Mozumdar
Summary: An efficient and facile strategy was adopted for the stepwise synthesis of the RGO-MSiO2/PdO hybrid nanomaterial (HY-NM), which exhibited excellent catalytic activity in multicomponent reactions due to its high surface area and large porosity facilitating the interaction of reactant molecules with the catalytic active species. The catalyst could be recycled multiple times, demonstrating ease of handling, and a simple work-up procedure as its main features.
DALTON TRANSACTIONS
(2021)
Article
Energy & Fuels
Maryam Sadehvand, Ahmad Amiri, Ali Pazoki, Farzaneh Fadaei Tirani
Summary: The electrochemical reduction of carbon dioxide to carbon monoxide was investigated using two different catalysts. These catalysts were synthesized and characterized using various spectroscopic techniques. The results showed that both catalysts exhibited high catalytic activity for the reduction of carbon dioxide to carbon monoxide under suitable reaction conditions.
Article
Chemistry, Applied
Yasutomo Goto, Shinji Inagaki
Summary: In this study, the structural changes of BPy-PMO and Pt-BPy-PMO caused by thermal treatment were investigated, and nitrogen-doped porous carbon/silica composites with high nitrogen/carbon ratios and large pore diameters were successfully prepared. The pyrolyzed BPy-PMO contained abundant graphitic nitrogen and carbon species, along with a few oxygenated species. Moreover, Pt complexes on the pore surface of BPy-PMO transformed into Pt oxide nanoparticles and a small amount of Pt metal after heating.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Chemistry, Applied
N. Sudheesh, Sumeet K. K. Sharma, Ram S. S. Shukla
Summary: HRh(CO)(PPh3)(3) encapsulated catalysts were synthesized using templates of C-10 - C-18 chain lengths and their effect on hydroformylation was studied. The pore structure was found to significantly impact the conversion and selectivity. Catalysts with lower chain length templates had smaller pore diameter and volume, resulting in lower conversion for all substrates. Aldehyde selectivity decreased at lower time for 1-hexene but increased with increasing template chain length. Recycling studies showed the precise effect of catalyst pore size, with larger pores leading to leaching of Rh-complex.
JOURNAL OF POROUS MATERIALS
(2023)
Article
Chemistry, Applied
Carmen Racles, Mirela-Fernanda Zaltariov, Adina Coroaba, Mihaela Silion, Cornelia Diac, Andrei Dascalu, Mihail Iacob, Maria Cazacu
Summary: The spent catalytic converter was treated to extract approximately half of its platinum group metals (PGMs) content, which were subsequently loaded onto mesoporous silica and tested as a new heterogeneous catalyst for hydrosilylation and oxidation reactions. Through these processes, complete re-valorization of the main components of the catalytic converter was achieved at laboratory level, with very low energy demanding procedures.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Chemistry, Applied
Qian Gu, PingPing Jiang, Yirui Shen, Kai Zhang, Phyu Thin Wai, Agus Haryono
Summary: Highly dispersed molybdenum trioxide was loaded into three-dimensional dendritic mesoporous silica nanospheres (MoO3@3D-DMSNs) via a one-pot method. These MoO3@3D-DMSNs showed better catalytic performance for olefin epoxidation, with optimal conditions at a Mo/Si molar ratio of 5%. The catalysts maintained their activity and stability after five reaction-regeneration cycles, demonstrating good potential for catalytic reactions.
JOURNAL OF POROUS MATERIALS
(2021)
Article
Chemistry, Physical
Shrouq Mujahed, Davide Gandolfo, Luigi Vaccaro, Evgueni Kirillov, Dmitri Gelman
Summary: In this study, a high-valent Ru(IV) bifunctional catalyst was successfully applied for the hydrosilylation of various functional groups. The high-valent hydride complexes showed high chemoselectivity and affinity towards reducing polar bonds. The scope, limitations, and plausible mechanism of the reaction were described.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Applied
Nassira Ferroudj, Patricia Beaunier, Anne Davidson, Sebastien Abramson
Summary: The study explored the relationship between the activity and structure of γ-Fe2O3/SiO2 nanocomposite microspheres as heterogeneous catalysts, revealing that doped Fe3+ and ordered mesoporosity significantly enhance the activity of the materials, demonstrating excellent oxidation and mineralization effects on simulated water pollutants.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Review
Chemistry, Organic
Ghodsi Mohammadi Ziarani, Shima Roshanka, Fatemeh Mohajer, Alireza Badiei
Summary: Mesoporous silica nanomaterials with surface silanol groups are advantageous for producing new and superior heterogeneous catalysts. Functionalized mesoporous SBA-15, including acidic, basic, Brønsted, Lewis acid, and chiral catalysts, are utilized in a wide range of organic syntheses. The immobilization of chiral ligands on SBA-15 is highlighted for achieving valuable chiral products.
CURRENT ORGANIC CHEMISTRY
(2021)
Article
Engineering, Environmental
Minghui Xiang, Maofang Huang, Hui Li, Wenbing Wang, Yuan Huang, Zhen Lu, Chen Wang, Ruofan Si, Wei Cao
Summary: In this study, novel nanoscale zero-valent iron/cobalt@mesoporous hydrated silica core-shell particles were synthesized for the rapid degradation of Tetrabromobisphenol A. By optimizing the catalyst ratio and reaction conditions, the particles exhibited excellent reactivity and mineralization activity for TBBPA removal.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Yusen Wu, Jie Wang, Yanchao Zhu, Xiaowang Yu, Zhikun Shang, Yun Ding, Aiguo Hu
Summary: A controlled polymerization strategy has been developed, where step-growth polycondensation is confined to the nanochannels of dendritic mesoporous silica nanoparticles, resulting in a variety of conjugated polymers with rich structural patterns. The obtained conjugated polymers have precisely controlled molecular weights with narrow molecular weight distributions, and can be freely processed in solution and exhibit bright fluorescence emission when casted in film, showing great potential for future applications.
CHEMICAL COMMUNICATIONS
(2021)
Article
Biochemistry & Molecular Biology
Micaela Richezzi, Claudia Palopoli, Nora Pellegri, Christelle Hureau, Sandra R. Signorella
Summary: A mononuclear Mn(III) complex with a clickable ligand was synthesized and covalently attached to modified mesoporous silica materials using click chemistry. The catalyst exhibited high catalytic rate for the dismutation of superoxide in aqueous medium, and the hybrid materials showed good stability and recyclability.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Yu Horiuchi, Dang Do Van, Yusuke Yonezawa, Masakazu Saito, Satoru Dohshi, Tae-Ho Kim, Masaya Matsuoka
Article
Chemistry, Multidisciplinary
Yu Horiuchi, Takashi Toyao, Kenta Miyahara, Lionet Zakary, Dang Do Van, Yusuke Kamata, Tae-Ho Kim, Soo Wohn Lee, Masaya Matsuoka
CHEMICAL COMMUNICATIONS
(2016)
Article
Chemistry, Organic
Tran Quang Hung, Do Trung Hieu, Dinh Van Tinh, Ha Nam Do, Tuan Anh Nguyen Tien, Dang Van Do, Le Thanh Son, Ngoc Han Tran, Nguyen Van Tuyen, Vu Minh Tan, Peter Ehlers, Tuan Thanh Dang, Peter Langer
Article
Chemistry, Multidisciplinary
Dang Van Do, Takuya Hosokawa, Yu Horiuchi, Masaya Matsuoka
RESEARCH ON CHEMICAL INTERMEDIATES
(2020)
Article
Chemistry, Analytical
Long Van Dang, Thu Thi Minh Nguyen, Dang Van Do, Son Thanh Le, Trong Dinh Pham, Anh Thi Mai Le
Summary: By carefully controlling the composition of reaction mixtures, the interzeolite conversion of FAU-type zeolites to CHA-type zeolites was successfully achieved, yielding highly crystalline CHA zeolites. High-silica CHA zeolites were synthesized using inexpensive organic structure-directing agents, with Si/Al ratio ranging from 5 to 140. The study highlights the importance of structural similarity between zeolite precursors, nucleation/crystallization processes, and the zeolite product in interzeolite conversion compared to traditional amorphous aluminosilicate gels.
JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY
(2021)
Article
Chemistry, Analytical
Hoa T. T. Duong, Mai T. P. Duong, Oanh K. Nguyen, Son T. Le, Long V. Dang, Binh T. Nguyen, Dang V. Do
Summary: The photocatalytic activity of Ti-SBA-15/C3N4 catalysts for degrading 2,4-D herbicides in water under visible light irradiation was investigated. The results showed that Ti-SBA-15/C3N4 with 2.5% Ti exhibited higher efficiency in 2,4-D degradation compared to Ti-SBA-15 and C3N4. The catalyst showed pseudo-first-order kinetics with a high degradation rate constant, and it could be reused for at least two cycles with only a slight decrease in catalytic activity.
JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Tran Quang-Hung, Tu T. Do, Viet Q. Hoang, Duc M. Tran, Ngo Quoc-Anh, Tuan-Anh L. Hoang, Reinhard Eckelt, Dang Do, Tuan T. Dang, Xuan-Hoan Vu
Summary: The application of a new efficient heterogeneous catalyst Ga-MCM-41-SO3H for the synthesis of celecoxib and pyrazole derivatives under room temperature is reported. The catalyst exhibited high yield and stability, and could be reused multiple times.
Article
Chemistry, Multidisciplinary
Minh Tuan Ha, Nina Thi Nguyen, Ngoc Huyen Tran, Quoc Viet Ho, Nguyen Thi Son, Van Ha Nguyen, Hien Nguyen, Dang Van Do, Tran Quang Hung, Binh Khanh Mai, Tuan Thanh Dang
Summary: In this article, an efficient and practical method for the synthesis of quinolines via an acceptorless dehydrogenation pathway is described. The Cu-catalyzed cyclization of 2-amino benzyl alcohol with ketones (or secondary alcohols) results in a range of highly functionalized quinolines in good yields under relatively mild conditions. Density functional theory (DFT) calculations provide mechanistic insights for the acceptorless dehydrogenation pathway.
CHEMISTRY-AN ASIAN JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Oanh K. Nguyen, Long Dang, Son T. Le, Tung D. Vu, Binh T. Nguyen, Thu T. M. Nguyen, Dang Do
Summary: This study reports a new application of CuFe2O4 spinel as an efficient heterogeneous catalyst for the selective oxidation of isoeugenol to licarin A under mild conditions. The catalyst was prepared using a simple method and characterized by various modern techniques. It showed excellent catalytic activity and stability.
Article
Chemistry, Organic
Tran Quang Hung, Ban Van Phuc, Pham Thi Thanh Loan, Do Thi Lan Nhi, Hien Nguyen, Hoan Xuan Vu, Dang Van Do, Tuan Thanh Dang
Summary: The aim of this study was to explore new applications of non-metal heterogeneous catalysts in the synthesis of 1,4-DHP derivatives. A greener and more efficient method for the synthesis of 1,4-DHPs and asymmetric 1,4-DHP (Felodipine drug) was successfully developed using a heterogeneous SBA-15-SO3H catalyst. The catalyst exhibited efficient activity, stability, and could be recycled at least 5 times without losing catalytic activity.
CURRENT ORGANIC SYNTHESIS
(2023)
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)
