Article
Chemistry, Multidisciplinary
Maosheng Li, Shuai Zhang, Xiaoyong Zhang, Yanchao Wang, Jinlong Chen, Youhua Tao, Xianhong Wang
Summary: The study describes an effective unimolecular anion-binding organocatalysis for ring-opening polymerization of O-carboxyanhydrides (OCAs), achieving the synthesis of highly isotactic poly(phenyllactic acid) (Ph-PLA) through a dynamic cooperative anion-binding mechanism. This approach addresses the challenge of synthesizing high molecular weight stereoregular polyesters by facilitating efficient chain propagation and maintaining high selectivity for OCA ring-opening over side reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Applied
N. Catherin, E. Blanco, D. Laurenti, L. Piccolo, F. Simonet, C. Lorentz, E. Leclerc, V Calemma, C. Geantet
Summary: The research explored the performance of various transition metal sulfides supported on Y zeolites in gas-phase decalin hydroconversion under high hydrogen pressure (5 MPa) and in the presence of 0.8% H2S concentration. The study revealed that catalytic activity was enhanced by using ternary sulfides, such as noble metal-based sulfides, leading to high decalin conversion levels and ring opening products.
Review
Chemistry, Physical
Claire A. L. Lidston, Sarah M. Severson, Brooks A. Abel, Geoffrey W. Coates
Summary: The ring-opening copolymerization (ROCOP) of epoxides with CO2 or cyclic anhydrides using multifunctional catalysts has been explored as a versatile route for synthesizing a wide range of polycarbonate and polyester copolymers. Covalently tethering the Lewis acid catalyst and cocatalyst together has been shown to increase both catalyst activity and selectivity in epoxide ROCOP. This review examines the development of multifunctional catalysts for copolymerization of epoxides with CO2, cyclic anhydrides, carbonyl sulfide (COS), and cyclic thioanhydrides, and evaluates how the mechanisms of these catalysts lead to improved activity and selectivity in ROCOP.
Article
Polymer Science
Li Yang, Yao-Yao Zhang, Guan-Wen Yang, Rui Xie, Guang-Peng Wu
Summary: The study explored a series of bifunctional organoboron catalysts with varying frameworks and nucleophiles for preparing PHBs, and the optimized catalyst achieved ideal reactivity with an excellent polymer selectivity (>99%) in a controlled manner.
Review
Chemistry, Multidisciplinary
Alex J. Plajer, Charlotte K. Williams
Summary: Heteroatom-containing polymers have potential as sustainable replacements for petrochemicals, offering a wide range of properties for various applications. Catalysed ring-opening copolymerisation (ROCOP) provides a route to create precise new polymer structures, leading to a renaissance in research and commercial products.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Katherine Paredes-Gil, Ramesh Sivasamy, Fernando Mendiz
Summary: In this study, a detailed mechanistic investigation of Z-selective ROMP was conducted using DFT calculations. The results showed that anti olefin attacks were kinetically more favorable than syn attacks, and the stabilization order of the ring-opening species played a crucial role in Z-selectivity.
MOLECULAR CATALYSIS
(2022)
Article
Polymer Science
Huan Qi, Rui Xie, Guan-Wen Yang, Yao-Yao Zhang, Cheng-Kai Xu, Yuhui Wang, Guang-Peng Wu
Summary: This study systematically investigates the catalytic performance of a series of well-defined organoboron catalysts in ring-opening polymerization (ROP) of epoxides. It is found that the increase of Lewis acidity and the number of B centers of the catalysts contribute to a high catalytic activity. Additionally, the catalysts are capable of producing telechelic polyols with controllable molecular weight in the presence of different chain transfer agents.
Article
Chemistry, Physical
Zhikun Tong, Xiang Li, Jingyu Dong, Rui Gao, Qiang Deng, Jun Wang, Zheling Zeng, Ji-Jun Zou, Shuguang Deng
Summary: Developing a catalyst to upgrade furfural to alcohols is important for fine chemical synthesis. Metal phosphate nanoparticles with different compositions were synthesized, showing high catalytic efficiency for producing alcohols. The catalysts displayed high activity and stability during recycling experiments.
Review
Chemistry, Applied
Farah Naz, Rahaman M. Abdur, Fatima Mumtaz, Mirella Elkadi, Francis Verpoort
Summary: This study reviews the application of heterogeneous catalysts in the ring-opening polymerization of cyclic esters, with a focus on metal-organic frameworks (MOFs) and supported catalysts. The importance of precise design and catalyst stability is emphasized in controlling polymerizations.
APPLIED ORGANOMETALLIC CHEMISTRY
(2023)
Article
Polymer Science
Kai-Yue Wang, Zhuo-Qun Li, Ming-Nuo Xu, Bo Li
Summary: In this paper, thiourea-quaternary ammonium salt bifunctional catalysts with both electrophilic and nucleophilic centers were designed for the efficient synthesis of polypeptides through ring-opening polymerization (ROP) of α-amino acid N-carboxyanhydrides (NCAs). We demonstrated the use of propylene oxide (PO) as an in situ activator for the efficient ROP of NCA in the presence of this bifunctional catalyst. The catalytic cycle involves three steps, including the initial nucleophilic attack of PO, the electrophilic attack of NCA, and the nucleophilic attack of N to complete chain growth. The structural factors and coupling thermodynamics were found to strongly influence the catalyst performance.
Article
Chemistry, Multidisciplinary
Jiandong Li, Fusheng Liu, Yalei Liu, Yong Shen, Zhibo Li
Summary: This study presents a method for chemoselective controlled ring-opening polymerization of bio-renewable bifunctional alpha-methylene-delta-valerolactone (MVL) using strong base/urea binary catalysts. The obtained high molecular weight polyester exhibits good mechanical properties. The pristine monomer can be recovered through thermolysis, establishing a closed-loop life cycle.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Organic
Karthick Govindan, Wei-Yu Lin
Summary: A LiOH-promoted hydrolysis selective C-N cleavage method for the synthesis of primary amides under mild conditions has been developed. The reaction shows high selectivity and yield for various aryl and alkyl substituents, and can be applied for gram-scale synthesis using a continuous flow method. This new methodology is applicable for both batch and flow conditions in synthetic and industrial applications.
Article
Chemistry, Physical
Wenli Zhao, Xiaopo Niu, Guangni Liu, Xiurong Zhang, Qingfa Wang
Summary: Three kinds of Pt nanocrystals with different morphologies were synthesized to prepare catalysts for the ring-opening reaction of decalin. The 5 nm truncated octahedral Pt/CNT-USY with exposed (100) and (111) facets showed higher yield of ring-opening products. Additionally, the 5 nm cubic Pt catalyst exhibited better catalytic activities compared to the 10 nm cubic Pt catalyst, attributed to the smaller size and more revealable metal active sites of Pt nanocrystals.
Article
Chemistry, Multidisciplinary
Yanchao Wang, Maosheng Li, Shixue Wang, Youhua Tao, Xianhong Wang
Summary: SCA monomers derived from amino acids are more reactive than thiolactones for ultrafast and selective ROP, resulting in controlled molecular weight, low dispersities, and retained stereoregularity of the synthesized polythioesters.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Fengzhi Fu, Yanan Liu, Yinwen Li, Baoai Fu, Lirong Zheng, Junting Feng, Dianqing Li
Summary: This study successfully enhanced the catalytic activity and selectivity of non-noble metal catalysts in the selective hydrogenation of acetylene by constructing an FeyMgOx-modified Cu interfacial structure. Through mechanism analysis, the roles of interfacial Cu and Fe atoms in the hydrogenation process were confirmed.
Article
Chemistry, Physical
Wanwitoo Wanmolee, Narongrit Sosa, Anchalee Junkaew, Saran Youngjan, Christophe Geantet, Pavel Afanasiev, Eric Puzenat, Dorothee Laurenti, Kajornsak Faungnawakij, Pongtanawat Khemthong
Summary: In situ characterization is essential for the development of heterogeneous catalysts. This study used XAS and XRD techniques to investigate the synthesis of Cu3P/SiO2 and its catalytic performance in lignin-derived bio-oil conversion. The findings can contribute to the enhancement of metal phosphide-based catalysts for converting lignin-derived bio-oils into biofuels in the future.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Daria Ryaboshapka, Laurent Piccolo, Mimoun Aouine, Pascal Bargiela, Valerie Briois, Pavel Afanasiev
Summary: In this study, ultradispersed molybdenum-based catalysts were successfully prepared by sulfidation of thiomolybdates and showed higher HDS activity than conventional MoS2 reference catalysts. Mixing with cobalt further increased the turnover frequencies, exceeding those of benchmark CoMoS catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Review
Energy & Fuels
Chetna Mohabeer, Nolven Guilhaume, Dorothee Laurenti, Yves Schuurman
Summary: This paper reviews the research progress on the thermo-chemical conversion of lignocellulosic biomass and waste into energy, focusing on both traditional thermally-heated reactors and microwave-heated reactors. Microwave-assisted pyrolysis (MAP) technology shows great potential, but there are also technical challenges to be addressed. The types of catalysts used and their impacts are discussed, and the advantages and drawbacks of fluidised bed reactors are detailed. Finally, future prospects of MAP are briefly presented.
Article
Chemistry, Multidisciplinary
Ana Belen Dongil, Elodie Blanco, Juan Jose Villora-Pico, Antonio Sepulveda-Escribano, Inmaculada Rodriguez-Ramos
Summary: The synthesis of methanol by carbon dioxide hydrogenation using copper-molybdenum carbides supported on various materials was studied. The effects of synthesis conditions and the support on the catalyst were investigated. The results showed that the catalyst prepared on high surface area graphite achieved the highest selectivity to methanol.
Article
Chemistry, Physical
Daria Ryaboshapka, Pascal Bargiela, Laurent Piccolo, Pavel Afanasiev
Summary: MoS2-C3N4 composite materials were synthesized by one-pot synthesis method, and the solids were characterized by various physical techniques. The results showed that even at the lowest Mo content, the materials contained individual MoS2 and C3N4 phases. The composite materials exhibited excellent thiophene hydrodesulfurization activity and photocatalytic hydrogen evolution activity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Analytical
William de Rezende Locatel, Chetna Mohabeer, Dorothee Laurenti, Yves Schuurman, Nolven Guilhaume
Summary: This study investigated the pyrolysis process of pure beech wood and a mixture of beech wood and polyamide-6, and found that the presence of polyamide-6 affected the properties and composition of the bio-oils produced. The use of a catalyst showed beneficial effects on pure beech wood, but these effects were mitigated with the mixture of beech wood and polyamide-6.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Chemistry, Physical
Elodie Blanco, Ana Belen Dongil, Isaac Tyrone Ghampson, Nestor Escalona
Summary: The choice of support material affects the carburization of rhenium, with different support materials leading to different carbidic species. Rhenium carbide obtained on ZrO2 exhibits the highest activity and selectivity towards benzene.
Article
Chemistry, Analytical
Aleksandra Lelevic, Christophe Geantet, Chantal Lorentz, Maxime Moreaud, Vincent Souchon
Summary: This article explores the changes in signal behavior in a vacuum ultraviolet absorbance detector with the introduction of make-up gas, and finds a non-linear relationship between the signal area and the total flow in the flow cell.
SEPARATION SCIENCE PLUS
(2023)
Article
Chemistry, Physical
Edgardo Leal Villarroel, Juan Seguel, Pedro Rodriguez, Elodie Blanco, Nestor Escalona, Gina Pecchi, Catherine Sepulveda
Summary: This study investigates the catalytic performance of Ru impregnated perovskites-based catalysts in the conversion of levulinic acid into higher valuable chemicals at different reaction temperatures. The Ru/BaZrO3 catalyst, with stronger basic sites, has a direct influence on the reaction.
Article
Chemistry, Physical
Bruno C. Magalhaes, Ruben Checa, Chantal Lorentz, Mathieu Prevot, Pavel Afanasiev, Dorothee Laurenti, Christophe Geantet
Summary: Global energy demand and environmental concerns have led to a growing emphasis on fuel production from renewable resources. Microalgae offer an attractive alternative carbon source. This study investigated the hydroconversion of bio-oil derived from hydrothermal liquefaction of microalgae using supported catalysts. NiW sulfide catalysts proved to be the most efficient, producing a hydrotreated oil with superior properties. The results suggest that different catalysts promote different reaction pathways, contributing to the conversion of refractory compounds.
Article
Chemistry, Multidisciplinary
Yige Yan, Adel Mesbah, Lhoussain Khrouz, Corinne Bouillet, Chantal Lorentz, Nicholas Blanchard, Anne C. Berends, Marie Anne van de Haar, Frederic Lerouge, Michael R. Krames, Ovidiu Ersen, Frederic Chaput, Stephane Parola
Summary: In this paper, the synthesis of ultra-small YPO4-YAG:Ce nanocomposite phosphor particles with high quantum yield (QY) of 53% and a particle size of approximately 10 nm is reported. The localization of phosphate and extra yttrium entities with respect to cerium centers in the YAG host has been determined using fine structural analysis techniques. The correlation between the additive-induced physico-chemical environment change around cerium centers and the increasing photoluminescence performance has been suggested based on experimental data and crystallographic simulation studies.
Article
Nanoscience & Nanotechnology
Cesar Pazo-Carballo, Elodie Blanco, Esteban Camu, Angel Leiva, Yoan Hidalgo-Rosa, Ximena Zarate, Ana Belen Dongil, Eduardo Schott, Nestor Escalona
Summary: Mono- and bimetallic UiO-66 nanocatalysts were synthesized and characterized in the aldol condensation reaction. The bimetallic UiO-66 nanocatalyst exhibited higher activity due to the synergetic effect between Zr and Hf, while the bimetallic catalyst with Zr and Ce showed antagonistic effect and lower activity. Incorporating Hf and Ce on Zr-UiO-66 favored benzalacetone formation.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Applied
Elodie Blanco, Paula Cabeza, Veronica Naharro Ovejero, Claudio Contreras, Ana Belen Dongil, I. Tyrone Ghampson, Nestor Escalona
Summary: The effect of different carbon supports on the formation of rhenium carbide was evaluated in the hydrodeoxygenation of guaiacol. The choice of support affected the carburization of rhenium, potentially due to the nature of oxygen function groups on the supports. The study identified the active sites responsible for converting guaiacol through quantification of CH4 mass signals during TPR measurements.
Article
Chemistry, Multidisciplinary
W. Liu, F. Morfin, K. Provost, M. Bahri, W. Baaziz, O. Ersen, L. Piccolo, C. Zlotea
Summary: Single-atom catalysts have attracted significant attention due to their unique catalytic properties. In this study, an Ir single-atom catalyst supported on a nitrogen-rich carbon substrate was prepared and found to exhibit substantial activity and high selectivity in the hydrogenation of butadiene. Quantitative operando X-ray absorption spectroscopy revealed that the initial Ir single atoms were coordinated with four light atoms and underwent partial reduction during pre-treatment.
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)