Articles tagged with Oxides
Researchers have developed a new hexagonal perovskite-related oxide with excellent ionic conduction at intermediate and low temperatures, paving the way for efficient solid oxide fuel cells. The material's stability and ion conduction remain dominant in reducing atmospheres.
A new device has been developed that converts sunlight into two promising sources of renewable fuels – ethylene and hydrogen. The researchers found that by optimizing the working conditions for cuprous oxide, a promising artificial photosynthesis material, they can create a more stable system.
The University of Texas at El Paso has received a $917,000 grant from the Air Force Office of Scientific Research to develop advanced materials for national defense, power electronics, and security. UTEP students will perform cutting-edge research on gallium oxide-based semiconductors.
A previously unknown source of the potent greenhouse gas nitrous oxide has been found in East Siberian Yedoma permafrost. The discovery highlights the significance of thawing permafrost as a globally important positive feedback to climate change.
Researchers at GIST have made a breakthrough in creating a perovskite material with easily tunable electrical properties. The study used ambient pressure X-ray photoelectron spectroscopy and low energy electron diffraction to investigate the effects of fabrication conditions on the material's surface.
Researchers from York University found that COVID-19 lockdowns in India had less impact on air pollution than initially thought. The study revealed that local sources of emissions, such as vehicles and fuels, had less influence on air pollutant levels than regional emissions sources.
Researchers from NTU Singapore found significant increases in pollutant emissions at major international seaports during the COVID-19 pandemic. Emissions rose by over 100% in some ports, with container ships and dry bulk carriers experiencing the largest spikes.
The research group developed ultra-sensitive solar-blind ultraviolet photodetectors (SBPDs) using amorphous gallium oxide (AGO) with high tolerance and spectrum-selectiveness. The SBPDs showed remarkable performances, including high response current and improved photoelectric performances under extreme conditions.
A team of UBCO researchers developed a recipe for a clean-burning, power-boosting aircraft fuel by adding graphene oxide nanomaterials to ethanol. This mixture improves the burn rate by about eight per cent, reducing carbon footprint and increasing engine power.
Researchers developed a strategy to achieve ultra-high loading of single metal atom sites on cobalt oxide support, stabilizing Rh and other noble metals. The strained surface showed exceptional UOR activity and stability, requiring lower working voltage than commercial Pt and Rh catalysts.
Researchers found that combining zinc oxide with small-molecule UV filter ingredients reduced UVA protection by 84.3-91.8% compared to non-mineral sunscreens. The study also showed toxic effects on zebra fish embryos when exposed to sunscreen mixtures containing zinc oxide.
Researchers developed a new strategy to achieve efficient and stable CO2 electrolysis in solid oxide electrolysis cells. They found that redox cycle manipulations promoted the exsolution of high-density metal/perovskite interfaces, improving performance and stability.
The study explores chromium oxides, magnetic compounds used in old tapes, and finds that adding oxygen atoms increases metallic properties. This allows for precise control over electrical conductance, enabling the design of molecular-sized components with vast processing and storage capacities.
Scientists from Tokyo University of Science and NIMS Japan have evaluated the irreversibility of LixWO3 thin films. They found that irreversible Li+ trapping and Li2WO4 formation are different processes, with proportions of 7.7% and 50.9%, respectively.
Researchers discovered that certain catalyst materials, such as erythrite, improve in performance over time due to restructuring. This process increases the surface area of the material, allowing for more reactions to occur, resulting in higher oxygen yields and doubled electrical current generation.
Researchers have observed a unique phenomenon where vibrations in a nickel oxide material increase with cooling, leading to the formation of faster fluctuations and ordered regions. This behavior is unusual and differs from the expected trend, which is that less thermal energy leads to more fluctuations freezing and order growing.
A recent award will aid a project that aims to produce more hydrogen gas while reducing electric power consumption. The goal is to increase clean hydrogen production, which can benefit various sectors such as household power, electric vehicles, and industrial applications.
Researchers found that green pigments had impurities that produced porous, poor quality concrete, while red and blue pigments had little effect. The study discovered that the morphology of hydration products and kinetics was related to compressive strength.
Scientists develop novel technology to recover multiple metals from various types of industrial waste using carbothermal reduction, reducing costs and enhancing sustainability. The approach also allows mixing different waste streams, enabling processing of large amounts of waste.
The article highlights the significant impact of nitrous oxide on the ozone layer and climate change. Chemical companies are now developing efficient technologies to reduce N2O emissions, including catalyst-based processes that can decrease emissions by up to 90%. The industry is also exploring alternative uses for captured N2O emissions.
Researchers developed graphene oxide membranes that maintain better filtration performance than commercial polymeric membranes. These membranes preserve the texture, flavor, and nutritional value of milk by rejecting fat, proteins, and some minerals.
Researchers at Diamond Light Source used Resonant Inelastic X-ray Scattering (RIXS) to study the magnetic properties of nickelate superconductors. The study revealed that these materials exhibit similar magnetic behavior to cuprates, bringing scientists closer to understanding how high-temperature superconductivity arises.
Researchers have found that nickelates exhibit antiferromagnetic interactions similar to cuprates, but with differences in magnetic excitations and doping effects. The study provides a new window into the physics of unconventional superconductors and could lead to the discovery of better materials.
Researchers have found a significant link between air pollution and an increased risk of dysmenorrhea, a common condition characterized by severe menstrual cramps. Long-term exposure to pollutants such as nitrogen oxides and fine particulate matter was shown to raise the risk of developing the disorder by up to 33 times.
Researchers found that metal-based nanomaterials like silver and zinc oxide can cross an in vitro model of the blood-brain barrier, affecting astrocyte cells and potentially leading to neurotoxicity. The study's discovery could help design safer nanomaterials and target brain diseases.
Researchers developed a new method to quantify proton kinetic properties of triple conducting oxides (TCOs), revealing two orders of magnitude higher proton tracer diffusion coefficient. This led to improved electrochemical performance for protonic ceramic fuel cells, with recorded values exceeding previous benchmarks.
A new study separated the impact of anthropogenic and natural pollutants on air quality during the COVID-19 pandemic. The researchers found that 72% of nitrogen oxides emissions in urban centers came from traffic and factories, while agricultural activities in rural areas contributed to faster recovery after lockdown.
A single treatment involving breathing in a mixture of oxygen and nitrous oxide significantly improved symptoms in people with treatment-resistant depression. Symptoms of depression improved rapidly following treatment, with benefits lasting for several weeks.
A new study found that a one-hour inhalation session with 25% nitrous oxide gas improved depression symptoms for over two weeks, with fewer adverse side effects compared to higher concentrations. The effects were nearly as effective as 50% nitrous oxide at rapidly relieving symptoms of treatment-resistant depression.
A phase 2 trial found that a single one-hour treatment with nitrous oxide can relieve symptoms of treatment-resistant depression for several weeks. The study showed significant improvements in depression symptoms, with a four-fold lower risk of adverse effects at lower concentrations.
Researchers developed catalysts for selective ethanol conversion, improving upon existing precious metal-based options. The new catalysts exhibit high alcohol conversion and selectivity to acetaldehyde, making them a promising alternative for industrial applications.
Integration of a mobility-enhanced field-effect transistor (FET) and a ferroelectric capacitor enables the creation of high-density, energy-efficient embedded memory directly on a microprocessor. This design significantly reduces signal travel distance, speeding up learning and inference processes in AI computing.
Researchers from Hefei Institutes of Physical Science created three manganese oxides with different Mn valences for high-capacity capacitive desalination. The results showed that these electrodes displayed high salt adsorption capacity and corresponding high salt adsorption rates surpassing other carbon materials.
New experiments show that water selectively leaches magnesium from typical rock minerals under extreme pressure and temperature conditions. This process could produce chemical gradients in the early history of water-rich sub-Neptune exo-planets, potentially preserving tracks of initial interactions between water and rocky material.
A new iron-nitrogen-doped carbon catalyst has been developed to preferentially reduce nitric oxide to hydroxylamine, reducing harmful air pollutants. The catalyst achieved efficient (71%) NH2OH production in a prototypical NO-H2 fuel cell and exhibited long-term stability.
Scientists have created elements comparable to brain neurons and synapses using spins, a magnetic property of electrons. This breakthrough could lead to the development of brain-like computer hardware that can interface with standard silicon-based circuits.
Etching processes were found to accelerate surface reconstruction and increase the formation of metal hydroxides, enhancing oxygen evolution reaction efficiency. This breakthrough has potential applications in other oxygen-susceptible metal compounds.
Researchers found that graphene oxide can carry polycyclic aromatic hydrocarbons into zebrafish, exerting sublethal effects and potentially causing malformations and neurotoxicity. Long-term exposure may lead to inhibition of acetylcholinesterase, a key enzyme in nervous system function.
Researchers develop novel nanocomposite with improved detoxification efficiency against various harmful chemicals, including organic compounds and microbes. The composite combines the high photoreactivity of titanium oxide nanotubes with the low cytotoxicity of graphene.
A recent study found that ozone pollution in Germany has decreased primarily due to reduced nitrogen oxide emissions. Ozone formation is often linked to NOx emissions from traffic and industrial processes. Lower NOx levels are positively correlated with lower ozone concentrations, especially in regions like southwestern Germany.
New research suggests a link between vitamin D deficiency and higher rates of heart disease among African Americans. The study found that darker-skinned individuals may be at greater risk of vitamin D deficiency due to lower levels of nitric oxide availability, which can lead to blood vessel dysfunction and hypertension.
A study by Penn State researchers suggests that dairy farmers can reduce nitrous oxide emissions from corn crops by applying manure after planting and using organic nitrogen amendments. The results show that this approach can lower total nitrogen application and mitigate climate change, while also protecting water quality.
A recent study has unveiled a new principle that active charge transfer at the interface between non-noble metals can enhance the catalytic performance of complex oxide catalysts. The researchers found that CeO2-deposited spinel oxide nanocubes exhibited a 12-times higher CO oxidation rate than pristine Co3O4 NCs.
Researchers at Argonne National Laboratory found that tuning the surface of lanthanum cobalt oxide perovskites with strontium enhances their activity and stability for the oxygen evolution reaction. This breakthrough could lead to more efficient and cost-effective methods for producing hydrogen fuel.
Researchers developed a new material that fills a crucial gap in the electronic material library. The ultrathin beta-tellurite oxide has high mobility and is highly transparent, enabling fast and efficient devices.
Researchers at KAUST have developed a novel method called thermal interdiffusion alloying (TIA) to create high-quality thin films of aluminum gallium oxide alloys. By controlling the annealing temperature and time, they achieved a record-high composition of up to 81% aluminum, resulting in a wide bandgap range.
Researchers discover that filters used in solar storm detectors are losing their ability due to another stowaway from Earth, not just carbonization. This issue affects satellite data quality and reliability, sparking efforts to create more accurate space weather forecasts.
Researchers have developed a Sn/reduced graphene oxide catalyst for efficient formic acid synthesis from CO2 through electrochemical reduction. The catalyst achieved a Faradic efficiency of 98% and significantly reduced overpotential, enabling the production of high-purity formic acid.
Researchers have created a more powerful, fast-charging supercapacitor with improved connectivity and recyclability using affordable tin. The material enhances the properties of cobalt oxide-based electrodes, leading to increased conductivity and promising practical applications.
The study found that air pollutants decreased more than carbon dioxide during the lockdown, confirming earlier assumptions. The researchers also revealed that domestic and commercial energy consumption contribute less to nitrogen oxide emissions than previously thought, with traffic responsible for over 90% of emissions.
Researchers found that minute amounts of zinc oxide in intimate contact with copper significantly improve the methanol production process. The study reveals how the choice of support material affects the behavior of active catalyst components, leading to changes in reaction selectivity.
Researchers at Texas A&M University have developed a new oxide dispersion strengthened (ODS) alloy with superior performance for use in fission and fusion reactors. The alloy is able to withstand temperatures up to 400 displacements per atom, making it one of the strongest ODS alloys developed in the field.
Researchers at Tokyo Institute of Technology have found a promising alternative to expensive electrocatalysts used in hydrogen production. Calcium iron oxide (CaFe2O4) has shown exceptional oxygen evolution reaction performance and durability, offering a cost-effective solution for water splitting.
Researchers propose a tri-layer mask design that includes a graphene oxide mixture for enhanced anti-bacterial activity. This coating simplifies the number of layers in the design while maintaining high filtration efficiency, making it suitable for reusable N95 masks.
The development of sub-diffraction optical writing overcomes the limitation of diffractive light, enabling a much-improved data density. The technology achieves an estimated storage capacity of 700 TB on a 12-cm optical disk, comparable to 28,000 Blu-ray disks.
Researchers have synthesized a rare metal complex of nitrous oxide, demonstrating its strong binding ability to metals, potentially opening new avenues for using it in synthetic chemistry. The findings could also help degrade N2O to harmless substances, mitigating its impact on the atmosphere.
Researchers at Georgia Institute of Technology have developed graphene oxide nanofiltration membranes that can effectively recycle pulping wastewater while rejecting chemicals, reducing energy consumption and costs. The new technology has the potential to save the paper industry over 30% in energy usage.
Researchers found significant differences in VOC concentrations and proportions vertically between winter and summer. Alkanes were the largest chemical species, primarily from gasoline combustion, which increased with altitude.
A team of scientists has developed a protective coating made from ultrathin gallium oxide to shield 2D materials from damage. This innovation enables the use of extremely thin materials in electronics, promising lower energy consumption and increased efficiency.
Researchers from Tokyo Metropolitan University have created a new tungsten-substituted vanadium oxide catalyst that works efficiently at 100-150 degrees Celsius, even in wet conditions. The material's superior performance makes it ideal for processing real industrial exhaust and contributing to cleaner air.