Articles tagged with Catalysis
Juan Jimenez, a Goldhaber postdoctoral fellow at Brookhaven National Laboratory, has been recognized as a Blavatnik Awards Finalist for his work on developing new catalysts to convert greenhouse gases into industrially useful materials. His research focuses on minimizing hazardous byproducts and using solvent-free processes.
Researchers from Tokyo Metropolitan University developed a new electrochemical cell that converts bicarbonate solution into formate ions with high selectivity and efficiency. The cell boasts unrivalled performances rivaling energy-hungry gas-fed methods, promising to have a significant impact on climate change technology.
Researchers developed a self-assembling catalyst to facilitate the reaction between alkenes and alcohols, producing ethers with improved efficiency, generality, and selectivity. The catalyst's design was inspired by enzymes, which can position reaction partners for optimal reactivity.
Researchers at Tsinghua University Press have developed effective synthesis strategies using carbon-based catalysts for converting CO2 into valuable chemicals and fuels. The team has designed various catalytic materials, including carburized iridium oxide nanorods, to enhance the activity of catalysts and selectivity of formate.
A highly active and selective molecular catalyst and electrified membrane have been developed to treat water contaminated with trichloroethylene. The catalyst, composed of cobalt phthalocyanine molecules mounted on multiwalled carbon nanotubes, breaks down TCE at record rates with nearly 100% Faradaic efficiency.
Researchers discovered Co3O4 as the most effective cobalt oxide electrocatalyst for quinoline hydrogenation, achieving high conversion rates under ambient conditions. This study advances understanding of catalytic mechanisms in the process, which has significant implications for pharmaceutical and petrochemical industries.
A review article discusses the application of operando ATR-SEIRAS in studying electrochemical CO2 reduction reaction mechanisms and surface-enhanced infrared spectroscopy. The technique helps understand reaction intermediates, catalyst performance, and local pH at the electrode.
A novel method for the selective chemical recycling of PET has been developed, allowing for the recovery of polyester from textile waste. The method uses alcohols and an inexpensive iron trichloride catalyst to yield diethyl terephthalate and ethylene glycol with high selectivity.
The study reveals that conformational change of Fe(IV)=O species and substrate coordination are key to the selective C-N coupling. The aziridination reaction involves rotation of the side-chain, causing steric hindrance that inhibits it. In contrast, hydroxylation has minor steric effects.
A new chemical process can vaporize plastics, reducing waste and creating hydrocarbon building blocks for new plastics. The catalytic process efficiently degrades a mix of post-consumer plastic waste, bringing closer a circular economy for many throwaway plastics.
Researchers found that plasmonic excitation of Cu nanowires dramatically enhances the nitrate reduction reaction (NO3RR) performance. The current density is enhanced by a factor of 3 under simulated solar irradiation, and the faradaic efficiency reaches nearly 100%.
Researchers have engineered a catalyst that converts methane into methanol in a single step, reducing the need for multiple reactions and increasing efficiency. The new process has potential applications for local deployment of stranded natural gas reserves.
The African American Transplant Access Program aims to mitigate disparities in solid organ transplantation, while a physician-created platform speeds clinical decision-making. NEJM Catalyst also explores quality and safety improvement through longitudinal care management for diabetes and hypertension.
Researchers developed a one-pot process to transform aromatic ketones into esters, simplifying the reaction process, reducing reaction times, and minimizing purification steps. The method enables seven different chemical transformations and has shown notable stability and reusability, making it scalable for industrial applications.
Scientists investigate SSZ-13 zeolite's role in DME carbonylation, revealing key factors affecting MA selectivity. Metal loading and spatial confinement play crucial roles in inhibiting side reactions and improving main reaction selectivity.
A team of scientists from Indian Institute of Science developed a surfactant from cashew nut shell liquid to catalyse industrially relevant reactions in water, leading to 80% higher product yields and replacing expensive catalysts. The study uses micellar catalysis to mimic biological systems.
Researchers at the University of Liverpool have achieved a significant milestone in converting carbon dioxide into valuable fuels and chemicals. They report a pioneering plasma-catalytic process for the hydrogenation of CO2 to methanol at room temperature and atmospheric pressure, achieving impressive selectivity rates.
Researchers developed an effective catalyst that significantly enhances ammonia conversion efficiency, offering potential for wastewater treatment and hydrogen production. The catalyst's design allows it to operate at lower voltages, producing less harmful substances like nitrite and nitrate.
A research team at Iowa State University has developed artificial intelligence technology that can model and understand complex chemical reactions, including those involved in ammonia production. The technology uses reinforcement learning to identify the optimal reaction pathway, promising to reduce production costs and emissions.
Researchers developed a method to produce cobalt nanoparticles with controlled crystal phase, leading to higher selectivity and efficiency in hydrogenation reactions. The study showcases the potential of abundant cobalt as an alternative to noble metal catalysts.
Research from the University of Illinois highlights the potential of organic nanozymes for broader applications beyond traditional uses of inorganic nanozymes. The development of sustainable, environmentally friendly materials offers a promising solution for various industries.
Researchers at the University of Illinois developed an eco-friendly method to precisely mix fluorine into olefins using natural enzymes and light, offering a more efficient strategy for creating high-value chemicals with potential applications in agriculture, pharmaceuticals, renewable fuels and more.
A rhodium-catalyzed [2+2+1] cycloaddition reaction expands the possibilities for creating complex organic molecules. The researchers achieved high enantiomeric excess values of 94-99% using phosphine ligands, enabling the synthesis of diverse compounds.
A new method to measure continuous light spectrum improves thermal imaging accuracy without direct contact. It eliminates wavelength and temperature dependence, revealing higher surface temperatures of photothermal catalysts than previous methods.
Researchers at USTC reveal 'volcano-type' relationship between metal loading and OER activity in Ir single-atom catalysts, with optimal performance found at moderate loadings. The study provides theoretical guidance for designing more efficient single-atom catalysts.
Researchers from USTC have created a cobalt-catalyzed enantioselective hydroalkylation process that enables the efficient construction of chiral tertiary carbon centers. This breakthrough solves the problem of uncontrollable stereochemistry in heteroatom-free alkene hydroalkylation reactions.
Researchers at Argonne National Laboratory have developed a faster and more energy-efficient way to manufacture propylene, a key chemical in producing polypropylene. The new process uses zirconium combined with silicon nitride, yielding higher catalytic activity and lower operating temperatures.
Researchers at USTC create a novel 'Janus' dual-atom catalyst with Fe and Co atoms coordinated synergistically through an N-O bridge, showing exceptional performance in ORR and OER. The strong electronic interaction between Fe-N3 and Co-O3 units optimizes adsorption and desorption processes, accelerating reaction kinetics.
A polyaniline catalyst coated in cobalt oxide nanoparticles has been developed to produce acetate through carbon dioxide electroreduction. The synergistic nature of the polyaniline and cobalt oxide combination enhances the transformation, resulting in improved crystallization and uniform deposits.
Research progress on VOC elimination via thermal catalysis or photothermal catalysis has been reported, including eliminating single-component and multi-component VOCs. The development of novel catalysts with improved stability is crucial for broad-spectrum control of VOC pollution.
A Montana State University researcher has developed nano-scale materials that can convert carbon dioxide into chemical building blocks, marking a potential step forward in reducing atmospheric CO2. The materials mimic enzymes and have the ability to selectively capture CO2 from the air.
A new study by Prof. Daniel Mandler and his team found that organic molecules can significantly influence the electrical properties of gold nanoparticles, up to 71 mV. The research highlights the importance of capping agents in controlling nanoparticle behavior and provides insights for customizing their interactions.
Researchers developed a new photocatalyst that enhances in-plane crystallinity and induces selective 2e-ORR, boosting H2O2 production. The method achieves a 6.1-fold increase in efficiency compared to traditional carbon nitride.
Researchers achieved a new method for synthesizing α-substituted carbonyl compounds using a palladium-catalyzed anti-Michael addition reaction. The method produces high-yield products and can be applied to various nucleophiles, including indoles and aromatic compounds.
A Northwestern University study reveals the experimental evidence for how the surface of iridium oxide changes during water electrolysis, enabling the design of a novel catalyst with higher activity and longer stability. The new catalyst is three to four times more efficient than existing iridium-based catalysts.
Researchers at Tsinghua University have developed a novel method for producing dimethoxymethane (DMM), a promising alternative to traditional fossil fuels. The team used phosphorus-modified nanocarbon catalysts, which demonstrated high methanol conversion rates and DMM selectivity.
Researchers develop innovative strategy to study reaction dynamics and rapid structural changes in protein crystals, enabling detailed analysis of intermediates. The method holds potential for designing new drugs, catalysts, and enzymatic systems.
Scientists have developed an efficient method for hydrogenolysis of 5-hydroxymethylfurfural (HMF) to 2,5-dimethylfuran (DMF) using a Ni-C3N4 catalyst with ultra-low Ni loading. The catalyst achieves high DMF yield and productivity, outperforming other metal-based catalysts.
Lehigh University researchers developed a novel spectroscopy technique called modulation excitation spectroscopy (MES) to study selective catalytic reduction (SCR) of nitrogen oxides. The results, published in Nature Communications, reveal the correct reaction pathway and have significant implications for optimizing catalytic converters.
Empa researchers have developed a system to investigate up to ten different reaction conditions for producing synthetic fuels from CO2. The system accelerates the discovery process by generating a large number of high-quality datasets, enabling scientists to make accelerated discoveries.
Researchers have developed a novel technique using a new holmium catalyst for synthesizing hydrocarbazoles with tetrasubstituted carbon. The method uses a lanthanide-based catalyst and can be recycled, paving the way for sustainable chemical processes.
Scientists at Tokyo Tech create innovative catalysts by encapsulating copper nanoparticles within hydrophobic porous silicate crystals, significantly enhancing catalytic activity and methanol production. The breakthrough paves the way for more efficient methanol synthesis from CO2.
Research elucidates catalyst selectivity in electrocatalysis through a multi-scale kinetic model. The study demonstrates the importance of surface roughness on reaction mechanisms, providing insights for optimizing catalyst performance and long-term operation.
Researchers have introduced new self-healing mechanisms to address the stability challenges in photoelectrochemical (PEC) water splitting. These mechanisms, such as intrinsic and extrinsic self-healing, aim to improve the long-term stability of semiconductor light absorbers, protection layers, and co-catalysts.
Researchers at Stanford University have made significant advancements in the development of a 'liquid battery' technology that uses LOHCs to store and release energy. The team discovered a novel, selective catalytic system that allows for the efficient storage of electrical energy in liquid fuels without generating gaseous hydrogen.
Researchers have created a new efficient catalyst for the oxygen evolution reaction, a crucial step in producing hydrogen from water. The catalyst is about four times better than the current state-of-the-art iridium catalyst, requiring less iridium to produce hydrogen at the same rate.
Researchers have discovered that a platinum nanoparticle catalyst can assemble and disassemble itself during reaction and post-reaction conditions. This reversible process may offer clues to the catalyst's stability and recyclability, with potential benefits for controlling long-term stability.
Researchers create Pt/CdS catalyst for upcycling polylactic acid to hydrogen and pyruvic acid through photothermal catalysis, improving the activity of the process. The study reveals that the oxidation of poly-lactic acid molecules is initiated by the cleavage of the α-C(sp³)-H bond.
Researchers at USTC design a tandem catalyst combining Cu single atoms with Co3O4 nanosheets, improving the electroreduction of nitrate into ammonia. The new catalyst achieves higher ammonia production rates than previous systems.
Scientists from the Department of Energy's Lawrence Berkeley National Laboratory have discovered a new way to produce ammonia, an essential fertilizer and component of cleaning products, using rare-earth metals as catalysts. The process operates at ambient conditions, reducing energy consumption and promoting food security.
A German junior research group at the University of Oldenburg is developing precious-metal-free catalysts to convert carbon dioxide into methanol, formaldehyde, and ethylene. The team aims to create inexpensive and durable materials for large-scale industrial applications.
Researchers developed a novel photocatalytic strategy for functionalizing ether C(sp3−H bonds in aryl ethers, resulting in high yields of ester products. The method uses chlorine radicals generated from various chloride sources to activate aryl ether C(sp3−H bonds through hydrogen atom transfer.
A metal-free organic framework catalyst has been developed for the electrocatalytic production of ethylene from carbon dioxide. The catalyst, based on a nitrogen-containing covalent organic framework (COF), demonstrated high selectivity and performance for the production of ethylene.
The new materials offer an alternative to metal-organic frameworks (MOFs) and have already shown early promise for the capture of iodine. They are yet to be fully explored but hold potential for applications in proton conduction, catalysis, water capture, and hydrogen storage.
A low-cost, tin-based catalyst selectively converts CO2 to ethanol, acetic acid, and formic acid, producing valuable liquid hydrocarbons. The discovery could help reduce greenhouse gas emissions by converting CO2 into desired chemicals near the site of production.
A novel multifunctional catalyst has been developed to convert methane into valuable hydrocarbons, reducing greenhouse gas emissions and energy consumption. The catalyst's spatial distribution of Cu and acid sites determines the final products, with uniform distribution leading to stable and efficient methanol production.
A team of researchers has gained new understanding of metal-nitrogen-carbon (M-N-C) catalysts, crucial for the development of low-cost and efficient hydrogen generation. By analyzing twelve distinct M-N-C configurations, they discovered that potential zero charge and solvation effects play a pivotal role in pH-dependent activities.
A team of chemists discovered that cyclopropanation reactions can take the scenic route, producing intricate molecular structures and unexpected side-reactions. Advanced techniques revealed a complex network of forking chemical pathways, showcasing the need for open-minded research and consideration of all possible side-reactions.
Researchers developed a cost-effective nanoparticle catalyst that converts CO2 into CO, producing syngas for valuable compounds. The β-Mo2C/SiO2 catalyst demonstrated high activity and stability compared to traditional precious metal-based catalysts.
A new sugar-based catalyst has successfully converted carbon dioxide into carbon monoxide, a building block for producing fuels that can replace gasoline. The catalyst, made from an inexpensive and abundant metal, offers a potential solution for disposing of captured carbon and reducing greenhouse gas emissions.