Review
Chemistry, Multidisciplinary
Ana Sousa-Castillo, Andrea Marino-Lopez, Begona Puertolas, Miguel A. Correa-Duarte
Summary: Bioorthogonal chemistry has provided a powerful tool for performing biocompatible chemospecific reactions in living systems, particularly in the areas of genetic encoding systems, bioimaging, and cancer therapy. This Minireview focuses on recent advances in the use of heterogeneous catalysts for bioorthogonal reactions, discussing the synthetic strategies of Pd-, Au-, and Cu-based materials, their applications in activating caged fluorophores and prodrugs, and the potential of using external stimuli for targeted drug release in diseased tissues. The review also highlights future directions and challenges in this emerging field.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Yuki Saito, Shu Kobayashi
Summary: The application of heterogeneous catalysts in continuous-flow enantioselective hydroacylation reactions was studied. Catalysts were prepared by mixing supports and rhodium complexes, and showed excellent activity and enantioselectivity. Under optimized conditions, the catalysts exhibited high turnover numbers and could be applied to various substrates. Furthermore, sequential-flow reactions with other heterogeneous catalysts were demonstrated for the synthesis of biologically active molecules and functional materials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Polymer Science
Eduard Karakhanov, Anton Maximov, Anna Zolotukhina
Summary: This article reviews the recent advances and applications of dendritic catalysis in the past two decades, with a focus on heterogeneous dendrimer-based catalysts. Three main approaches to synthesizing immobilized heterogeneous dendrimer-based catalysts are considered, and magnetically separable dendritic catalysts are also discussed. These dendritic catalysts can be stored as powders and easily separated from the reaction medium, maintaining efficiency similar to homogeneous dendritic catalysts.
Review
Chemistry, Multidisciplinary
Lifei Lian, Huaiying Zhang, Sai An, Wei Chen, Yu-Fei Song
Summary: POMs, as a class of discrete anionic metal-oxygen clusters with tunable structure, exhibit super strong Bransted acidity, high proton mobility, and thermal stability, making them potential green alternatives to conventional homogeneous acid catalysts. Through design strategies such as functionalized cations, covalent interactions, non-precious metal support, and porous polymer framework, POMs-based heterogeneous catalysts have shown excellent catalytic performance in specific acid-catalyzed reactions.
SCIENCE CHINA-CHEMISTRY
(2021)
Review
Chemistry, Multidisciplinary
Justus Diekamp, Thomas Seidensticker
Summary: The recycling of homogeneous catalysts in a homogeneous matrix is a challenging task for many reactions aiming for industrial applications. Although various synthetic approaches for recyclable homogeneous catalysts exist, a concise overview of catalyst modifications is lacking in the literature. This review aims to fill this gap by summarizing the existing synthesis pathways for polar, non-polar, fluorous, and molecular-weight-enlarged catalysts and examining their modular and late-stage approaches. Additionally, the potential for a generally applicable tag library to facilitate catalyst modifications for specific recycling strategies is explored.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Review
Chemistry, Multidisciplinary
Yang Chen, Jian Lin, Qin Pan, Xu Liu, Tianyi Ma, Xiaodong Wang
Summary: Dual-atom catalysts (DACs) have become a new frontier in heterogeneous catalysis due to their unique intrinsic properties. The synergy between dual atoms provides flexible active sites, promising to enhance performance and even catalyze more complex reactions. However, precisely regulating active site structure and uncovering dual-atom metal interaction remain grand challenges.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Multidisciplinary Sciences
Yanyan Zhao, Sheng Dai, Ke R. Yang, Sufeng Cao, Kelly L. Materna, Hannah M. C. Lant, Li Cheng Kao, Xuefei Feng, Jinghua Guo, Gary W. Brudvig, Maria Flytzani-Stephanopoulos, Victor S. Batista, Xiaoqing Pan, Dunwei Wang
Summary: Atomically dispersed catalysts have shown high activity for selective oxidation of carbon monoxide with excess hydrogen, but their stability is not ideal. This study demonstrates that introducing a structural component to minimize the diffusion of the active metal center significantly improves stability without compromising activity. By using a dinuclear iridium heterogeneous catalyst as a study platform, two types of oxygen species, interfacial and bridge, are identified to work together for both activity and stability. This work provides important insights into the synergistic effect between the active metal center and the supporting substrate, with potential broad applications for atomically dispersed catalysts.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Chemistry, Physical
David Tetour, Tomas Paska, Veronika Makova, Barbora Nikendey Holubova, Jana Karpiskova, Michal Rezanka, Jiri Brus, Jana Hodacova
Summary: Two hybrid organosilica materials containing bis-cinchonine-phthalazine bridging organic unit were synthesized and used as heterogenized ligands in catalysis of enantioselective Sharpless alkene dihydroxylation. The nanostructured material exhibited higher enantioselectivities than the bulk material and could be used at least five times without loss of enantioselectivity.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Laurynas Gausas, Bjarke S. Donslund, Steffan K. Kristensen, Troels Skrydstrup
Summary: Polyurethane (PU) is a commonly used thermoset plastic with complex structure, leading to challenges in recycling. The study shows that catalytic hydrogenation of PU materials using a manganese catalyst can effectively deconstruct PU into original monomer components for efficient recovery.
Article
Chemistry, Multidisciplinary
Shibashish D. Jaydev, Antonio J. Martin, Javier Perez-Ramirez
Summary: The study successfully converted polypropylene into liquid hydrocarbons with up to 80% selectivity for motor oil using carbon-supported platinum nanoparticles. It was found that the selectivity was controlled by the binding strength of hydrocarbon on the carbon carrier, with an optimal effect seen in carbons with high oxygen content.
Review
Chemistry, Multidisciplinary
Qian Qian Hao, Zhen Zhang, Ya Mao, Kai Xue Wang
Summary: Li-CO2 batteries have attracted extensive attention for their high energy density and utilization of CO2, but their practical application is limited by inferior electrochemical performance. Developing efficient electrocatalysts is crucial for enhancing the performance of Li-CO2 batteries.
Review
Chemistry, Physical
Zhe Wang, Qian Luo, Shanjun Mao, Chunpeng Wang, Jinqi Xiong, Zhirong Chen, Yong Wang
Summary: This review highlights the significance of alkyne semi-hydrogenation in modern industry and the efforts to regulate catalyst structure to suppress side reactions. It also provides an updated perspective on the fabrication of next-generation catalysts for alkyne semi-hydrogenation.
Review
Chemistry, Physical
Yafei Shen
Summary: The recycling of electrode materials from spent lithium-ion batteries (LIBs) focuses on the recovery of transition metals for the production of new batteries or catalysts. Hydrometallurgical processes are more commonly used than pyrometallurgical processes for the recovery of transition metal oxides, which have a significant impact on catalysis applications. Additionally, the synthesis of transition metal based compounds should be developed to enhance their photo-electro-catalytic activities.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Anne V. Le, Biplab Rajbanshi, Raul F. Lobo, Peng Bai
Summary: In this study, DFT calculations were used to investigate the mechanisms of propene metathesis catalyzed by WOx/SiO2. The results showed that there are still many mechanisms of heterogeneous catalyzed metathesis reactions that are not well understood. The pseudo-Wittig mechanism was found to be the most favorable method for generating initial alkylidene active sites. The allylic and vinylic C-H activations are more difficult and require the reduction of surface sites to W(+4).
JOURNAL OF CATALYSIS
(2023)
Article
Engineering, Environmental
Bingxu Chen, Hao Du, Yuning Guo, Shaona Wang, Jianping Peng, Yi Zhang, Lanjie Li, Congmei Xu
Summary: This study presents an effective and environmentally friendly method for recovering vanadium, nickel, and molybdenum from spent hydrodesulfurization catalysts. The leaching efficiencies of the three metals were determined, and it was found that MoV9O285- influenced the solubility of NH4VO3. The separation process involved pre-oxidizing MoV9O285- and precipitating it as MoO3(O-2)(2-) and V10O286-, while nickel was recovered through cooling crystallization.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Elsayed Mousa, Xianfeng Hu, Ludvig Annhagen, Guozhu Ye, Antonella Cornelio, Ario Fahimi, Elza Bontempi, Patrizia Frontera, Charlotte Badenhorst, Ana Claudia Santos, Karen Moreira, Alexandra Guedes, Bruno Valentim
Summary: This paper reports on the characterization of two grades of black mass from spent lithium-ion batteries and their behavior during heating trials. The study provides important insights for optimizing lithium-ion battery recycling processes by fully characterizing black mass samples before and after heating.
Article
Chemistry, Physical
Patrizia Frontera, Angela Malara, Anastasia Macario, Mariachiara Miceli, Lucio Bonaccorsi, Marta Boaro, Alfonsina Pappacena, Alessandro Trovarelli, Pier Luigi Antonucci
Summary: In this study, the catalytic behavior of nickel-based catalysts supported on ceria/zirconia, undoped and doped with lanthanum and neodymium, was investigated under steam reforming, partial oxidation and autothermal reforming reactions of different fuels. The catalytic properties were evaluated at a temperature of 800 degrees C, under atmospheric pressure, using steam/carbon and oxygen/carbon ratio, respectively, of S/C = 2.5 and O/C = 0.5. The doped catalyst showed better catalytic performance and resistance to deactivation due to improved distribution of nickel species and higher concentration of defect groups and oxygen vacancies on the catalyst surface.
Article
Engineering, Chemical
Patrizia Frontera, Angela Malara, Marta Boaro, Andrea Felli, Alessandro Trovarelli, Anastasia Macario
Summary: Ruthenium/nickel ex-solved perovskite catalysts were synthesized and characterized for ethanol autothermal reforming. The catalysts exhibited high ethanol conversion and hydrogen yield, with the SFMN/0.5Ru catalyst containing 0.5 wt% Ru showing the best performance. Increasing the amount of Ru in the catalyst resulted in reduced hydrogen yield and increased coke deposition.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Chemistry, Physical
Angela Malara, Lucio Bonaccorsi, Antonio Fotia, Pier Luigi Antonucci, Patrizia Frontera
Summary: Membrane technologies and materials development are important for hydrogen/natural gas separation in the transition to hydrogen economy. Current studies focus on developing novel materials for gas separation, including additives in a polymeric matrix. However, selectively separating high purity hydrogen from hydrogen/methane mixtures remains a challenge. Fluoro-based polymers like PVDF-HFP and Nafion(TM) are popular membrane materials, but further optimization is needed. This study tested hybrid polymer-based membranes for hydrogen/methane separation and found the best performance with a 4:1 PVDF-HFP/Nafion(TM) weight ratio.
Review
Green & Sustainable Science & Technology
Patrizia Frontera, Lucio Bonaccorsi, Antonio Fotia, Angela Malara
Summary: Technology needs to improve energy generation and utilization to support human societies. All highly industrialized nations are attempting to switch from fossil fuels to renewable energy sources, but the support is still not strong enough. Energy-efficient and renewable heating and cooling systems have great potential in saving energy, as buildings still heavily rely on fossil fuels for heating and cooling. Innovations in thermal energy storage materials are crucial for this transition, and this work reviews a new approach using electrospun microfibers for energy recovery in low-temperature range.
Article
Chemistry, Multidisciplinary
Pierantonio De Luca, Carlo Siciliano, Janos B. Nagy, Anastasia Macario
Summary: The purpose of this research was to evaluate the adsorbent properties of carbon nanotubes for purifying water contaminated with automotive diesel. The study investigated whether the high molecular weights of hydrocarbon molecules in diesel would affect the adsorption capacity of carbon nanotubes. NMR analysis, FT-IR spectroscopy, and thermal analysis were used to characterize the post-adsorption phases. The results showed that carbon nanotubes were efficient in adsorbing diesel, could be reused in multiple cycles, and allowed for the recovery of adsorbed diesel and treated water.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Geological
Daniela Dominica Porcino, Giuseppe Tomasello, Francesco Mauriello, Angela Malara
Summary: This research conducted comprehensive experimental investigation on the geotechnical characterization of new synthetic lightweight aggregates (SLAs) composed of reused biomass fly ash and waste plastics. The SLAs were evaluated for their compressibility, creep properties, compaction features, stress-strain-strength behavior, hydraulic conductivity, and water absorbability. The study found that the fly ash-HDPE aggregate had less compressibility compared to the fly ash-LDPE aggregate, and its creep coefficient was comparable to or even lower than that of other recycled materials. The aggregates also exhibited favorable permeability properties and proved to be environmentally sustainable.
ENVIRONMENTAL GEOTECHNICS
(2023)
Article
Engineering, Chemical
Pierantonio De Luca, Carlo Siciliano, Janos B. Nagy, Anastasia Macario
Summary: This review summarizes the most significant results reported in the literature on the use of carbon nanotubes in heterogeneous catalytic reactions. Carbon nanotubes are versatile materials and find applications in various sectors. Their thermal and chemical stability, large surface area, and high adsorbent and regenerative abilities make them excellent materials for industrial catalytic processes.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Review
Chemistry, Inorganic & Nuclear
Pierantonio De Luca, Janos B. Nagy, Anastasia Macario
Summary: This study provides information on the use of nanomaterials to combat the spread of the SARS-CoV-2 virus and discusses the strategies for utilizing the unique properties of nanomaterials in the production of personal protective equipment (PPE) for defense against the virus.
Article
Green & Sustainable Science & Technology
Antonio Fotia, Patrizia Frontera, Lucio Bonaccorsi, Beniamino Sciacca, Angela Malara
Summary: Heavy metal contamination is a significant environmental and health concern. This study develops a sensing material for their detection using the electrospinning technique to encapsulate the disodium salt of EDTA. The optimized active layer is tested using electrochemical impedance spectroscopy. The electrospun mats show lead detection in the 10-100 000 μg/L range with a detection limit of 0.031 μg/L.
ADVANCED SUSTAINABLE SYSTEMS
(2023)