Current Precious Metals News and Events

Current Precious Metals News and Events, Precious Metals News Articles.
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Synthesis of a rare metal complex of nitrous oxide opens new vistas for
Like its chemical relative carbon dioxide (CO2), nitrous oxide (N2O) is an important greenhouse gas and the dominant ozone-depleting substance. Strategies for limiting its emissions and its catalytic decomposition with metals are being developed. A study indicates that nitrous oxide can bind to metals similarly to carbon dioxide, which helps to design new complexes with even stronger bonding. This could allow the use of nitrous oxide in synthetic chemistry. (2021-02-22)

Researchers grow artificial hairs with clever physics trick
Things just got hairy at Princeton. Researchers found they could coat a liquid elastic on the outside of a disc and spin it to form useful, complex patterns. When spun just right, tiny spindles rise from the material as it cures. The spindles grow as the disc accelerates, forming a soft solid that resembles hairs. Published in PNAS Feb. 22 (2021-02-22)

RUDN University chemist used iodine to synthesize new chalcogenides
A chemist from RUDN University, working with a group of colleagues, synthesized three new chalcogenides (compounds that contain metals and elements from group 16 of the periodic table). The team suggested an unusual approach to synthesis that was based on iodine. (2021-02-19)

Plastic recycling results in rare metals being found in children's toys and food packaging
Scientists from the University of Plymouth and University of Illinois at Urbana-Champaign tested a range of new and used products - including children's toys, office equipment and cosmetic containers - and found they contained quantities of rare earth elements. (2021-02-17)

Understanding catalytic couplings: not all synergies are simple
Negishi cross-coupling reactions have been widely used to form C-C bonds since the 1970s and are often perceived as the result of two metals (i.e zinc and palladium/nickel) working in synergy. Researchers from the Martin group at ICIQ have delved into the Negishi cross-coupling of aryl esters using nickel catalysis to understand how this reaction works at the molecular level and how to improve it. The results have been published in Nature Catalysis. (2021-02-08)

Fossil pigments shed new light on vertebrate evolution
This new paper shows that melanin is more than just something that gives colour to the body. It played an important role in the evolution of warm-blooded animals and helped defined what birds and mammals look like today. By studying where melanin occurs in the body in fossils and modern animals researchers have produced the first model for how melanin has evolved over the last 500 million years. (2021-02-04)

Islands without structure inside metal alloys could lead to tougher materials
An international team of researchers produced islands of amorphous, non-crystalline material inside a class of new metal alloys known as high-entropy alloys. This discovery opens the door to applications in everything from landing gears, to pipelines, to automobiles. The new materials could make these lighter, safer, and more energy efficient. (2021-01-29)

It's elemental: Ultra-trace detector tests gold purity
Ultra-trace radiation detection technique sets new global standard for measuring the nearly immeasurable (2021-01-28)

Photocatalytic reaction in the shadow
Photoelectrochemical water splitting is a promising technology to convert solar energy into value-added fuels. Theoretically, silicon-based metal-insulator-semiconductor (MIS) photocathode can achieve high efficiency. However, the parasitic light absorption caused by catalysts and metals, as well as the lack of metals to form a large band-offset with p-Si, severely limit their performances. Scientists based in China have demonstrated an illumination-reaction decoupled MIS photocathode using n-Si to prevent the parasitic light absorption while establishing a large band-offset. (2021-01-25)

Single atoms as a catalyst: Surprising effects ensue
Catalysts are getting smaller - ''single-atom'' catalysts are the logical end point of this downsizing. However, individual atoms can no longer be described using the rules developed from larger pieces of metal, so the rules used to predict which metals will be good catalysts must be revamped - this has now been achieved at TU Wien. As it turns out, single atom catalysts based on much cheaper materials might be even more effective. (2021-01-22)

New technique builds super-hard metals from nanoparticles
Brown University researchers have shown a way to make bulk metals by smashing tiny metal nanoparticles together, which allows for customized grain structures and improved mechanical and other properties. (2021-01-22)

Teamwork in a molecule
Chemists at the Friedrich Schiller University Jena have demonstrated the value of 'teamwork' by successfully harnessing the interaction between two gallium atoms in a novel compound to split the particularly strong bond between fluorine and carbon. The gallium compound is also cheaper and more environmentally friendly than conventional alternatives. (2021-01-21)

Stanford: forecasting coastal water quality
Using water samples and environmental data gathered over 48 hours or less, Stanford engineers develop a new predictive technique for forecasting coastal water quality, a critical step in protecting public health and the ocean economy. (2021-01-21)

Zebra stripes, leopard spots: frozen metal patterns defy conventional metallurgy
''Stripy zebra, spotty leopard...'' Pattern formation and pattern recognition entertains children and scientists alike. Alan Turing's 1950s model explaining patterns in two-substance systems is used by metallurgists to explain microscopic internal stripes and spots. A study out today explains exotic patterns, counter to Turing's theory, forming on the liquid metal gallium, which melts in the hand. The previously ignored surface-solidification phenomenon improves fundamental understanding of liquid-metal alloys, with a potential patterning tool, and advanced applications in future electronics and optics. (2021-01-18)

Giving the hydrogen economy an acid test
Tsukuba University scientists show that the effectiveness of hydrogen-producing metal catalysts protected by graphene depends on the ability of protons to penetrate into the inner metallic surface. This work may lead to widely available hydrogen-powered cars. (2021-01-14)

Groundwater drives rapid erosion of the Canterbury coastline, New Zealand
Groundwater flow and seepage can form large gullies along coastal cliffs in the matter of days, it has been discovered. (2021-01-12)

Making hydrogen energy with the common nickel
POSTECH joint research team develops a nickel-based catalyst system doped with oxophilic transition metal elements. (2021-01-12)

'Swiss Army knife' catalyst can make natural gas burn cleaner
'Swiss Army knife' catalyst can bring the combustion temperature of methane down by about half - from above 1400 degrees Kelvin down to 600 to 700 degrees Kelvin. (2021-01-11)

Discovery of quantum behavior in insulators suggests possible new particle
A team led by Princeton physicists discovered a surprising quantum phenomenon in an atomically thin insulator made of tungsten ditelluride. The results suggest the formation of completely new types of quantum phases previously hidden in insulators. (2021-01-11)

Liquid metal ink liberates form
POSTECH-Yonsei University joint research team develops liquid metal ink for 3D circuit lines. (2021-01-10)

USTC develops ultrahigh-performance plasmonic metal-oxide materials
In a study published in Advanced Materials, the researchers from Hefei National Laboratory for Physical Sciences at the Microscale, the University of Science and Technology of China of the Chinese Academy of Sciences, using an electron-proton co-doping strategy, invented a new metal-like semiconductor material with excellent plasmonic resonance performance. (2021-01-08)

Researchers question fundamental study on the Kondo effect
In 1998, spectroscopic studies on the Kondo effect using scanning tunnelling microscopy were published, which are considered ground-breaking and have triggered countless others of a similar kind. Many of these studies may have to be re-examined now that researchers from J├╝lich, Germany have shown that the Kondo effect cannot be proven beyond doubt by this method. Instead, another phenomenon is creating precisely the spectroscopic ''fingerprint'' that was previously attributed to the Kondo effect. (2021-01-07)

Theory describes quantum phenomenon in nanomaterials
Theoretical physicists Yoshimichi Teratani and Akira Oguri of Osaka City University, and Rui Sakano of the University of Tokyo have developed mathematical formulas that describe a physical phenomenon happening within quantum dots and other nanosized materials. The formulas, published in the journal Physical Review Letters, could be applied to further theoretical research about the physics of quantum dots, ultra-cold atomic gasses, and quarks. (2020-12-23)

Exposure to metals can impact pregnancy
Exposure to metals such as nickel, arsenic, cobalt and lead may disrupt a woman's hormones during pregnancy, according to a Rutgers study. (2020-12-21)

Speeding toward improved hydrogen fuel production
A new material developed by a team led by Berkeley Lab will help to make hydrogen a viable energy source for a wide range of applications. (2020-12-21)

Big step with small whirls
Skyrmions are small magnetic objects that could revolutionize the data storage industry and also enable new computer architectures. However, there are a number of challenges that need to be overcome. A team of Empa researchers has succeeded for the first time in producing a tunable multilayer system in which two different types of skyrmions - the future bits for ''0'' and ''1'' - can exist at room temperature, as they reported in the journal Nature Communications. (2020-12-21)

Simple and cost-effective extraction of rare metals from industrial waste
Researchers from Kanazawa University developed a protocol to efficiently purify palladium and silver ions from industrial waste, and convert the ions into pure metallic elements. This will help increase global stock of valuable elements that are widely needed yet in scarce supply. (2020-12-18)

New topological properties found in "old" material of Cobalt disulfide
Researchers working with the Schoop Lab discovered the presence of Weyl nodes in bulk CoS2 that allow them to make predictions about its surface properties. The material hosts Weyl-fermions and Fermi-arc surface states within its band structure, which may enable it to serve as a platform for exotic phenomena. (2020-12-18)

Organic molecules on a metal surface... a machinist's best friend
Purdue University innovators are working on technologies to make it easier to cut metals. The researchers found, using organic monolayer films created by molecular self-assembly, that the molecule chain length and its adsorption to the metal surface are key to realizing improvements. (2020-12-17)

Research breakthrough could transform clean energy technology
A team of researchers has developed a new method of harnessing solar energy, moving us closer to a clean energy future. (2020-12-17)

Extracting precious zinc from waste ash
Incineration of solid waste produces millions of tonnes of waste fly ash in Europe each year, that most commonly ends up in landfill. But this ash often contains significant amounts of precious metals, such as zinc. A unique method developed by researchers at Chalmers University of Technology, Sweden, can now help extract these precious metals, potentially leading to reductions in environmental pollution, landfill and transport. (2020-12-16)

Scientists discover a new complex europium hydride
A team of researchers from Russia, the United States, and China led by Skoltech Professor Artem R. Oganov has discovered an unexpected very complex europium hydride, Eu8H46. Although devoid of superconductivity, europium hydrides are very interesting in view of chemical anomalies that make europium different from other rare-earth atoms. (2020-12-15)

Researchers find a better way to design metal alloys
A system developed by MIT researchers uses machine learning to analyze boundaries between crystal grains, allowing for the selection of desired properties in a new metal alloy. (2020-12-11)

Astronomical instrument hunts for ancient metal
Researchers created a new astronomical instrument that has successfully aided in estimating the abundance of metals in the early universe. The WINERED instrument allows for better observations of astronomical bodies like quasars in the early universe, billions of years ago. Researchers hope this deeper level of exploration could help answer questions about the origins not only of metals in the universe but also of the stars themselves. (2020-11-30)

N-heterocyclic phosphines: promising catalysts for transfer hydrogenation
N-heterocyclic phosphines (NHPs) have recently emerged as a new group of promising catalysts for metal-free reductions, owing to their unique hydridic reactivity. Compared with the conventional protic reactivity of phosphines, this umpolung P-H reactivity leads to inverse selectivity in NHP-mediated reductions, which has therefore found many applications in the catalytic reduction of polar unsaturated bonds. This review summarizes recent progress in studies of the reactivity and synthetic applications of these phosphorus-based hydrides. (2020-11-30)

New procedure will reduce the need for rare metals in chemical synthesis
Researchers from Kanazawa University performed an important type of tertiary alkylative cross-coupling reaction without using a rare-metal catalyst. Such efforts are needed to improve the long-term sustainability of important chemical syntheses and minimize supply chain disruptions caused by pandemics and other crises. (2020-11-27)

New material 'mines' copper from toxic wastewater
A team of scientists led by Berkeley Lab has designed a new material -- called ZIOS (zinc imidazole salicylaldoxime) -- that targets and traps copper ions from wastewater with unprecedented precision and speed. The technology offers the water industry and the research community the first blueprint for a water-remediation technology that scavenges heavy metal ions with a measure of control that far surpasses the current state of the art. (2020-11-24)

Stable catalysts for new energy
Looking for the perfect catalyst is not only about finding the right material, but also about its orientation. Depending on the direction in which a crystal is cut and which of its atoms it thus presents to the outside world on its surface, its behavior can change dramatically. (2020-11-24)

UCF researcher zeroes in on critical point for improving superconductors
Developing a practical ''room temperature'' superconductor is a feat science has yet to achieve. However a UCF researcher and his colleagues are working to move this goal closer to realization by taking a closer look at what is happening in ''strange'' metals. The research was published recently in the journal Communications Physics - Nature. (2020-11-23)

A filter for environmental remediation
Scientists at Osaka University discovered a new method for producing sodium titanate mats nanostructured in a seaweed-like morphology for filtering heavy metal ions and radioactive materials from water. This work may lead to advances in treating contaminated wastewater. (2020-11-19)

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