Sentences with phrase «at oxide surfaces»

«Here, using theory, we can give insights into how orbital splitting correlates with bifunctionality at oxide surfaces — which hadn't been seen before.»

Not exact matches

The testing found that transitional ore between oxides at the surface and the bedrock sulphides is suited to CIL treatment, and can be processed at a 30 % lower cost than previously thought.

By: Robyn Wilkinson 4th November 2016 There is an increasing investment trend involving near - surface, easily mined base metal oxide deposits in Africa that can generate early cash flow amid current commodity prices to fund further exploration of the deposit at a later stage, advances specialist consultant to the mining industry The... →

Shirley Meng, a professor at UC San Diego's Department of NanoEngineering, added, «This beautiful study combines several complementary tools that probe both the bulk and surface of the NMC layered oxide — one of the most promising cathode materials for high - voltage operation that enables higher energy density in lithium - ion batteries.

One of the unexpected consequences of the October 28 flare was a fivefold increase in ozone - destroying nitric oxide at 70 miles above Earth's surface.

A team led by Kaveh Pahlevan at Yale University calculate that as rock vapour rose from Earth's hot, roiling surface, the magnesium oxide it contained would have condensed into droplets and rained back to the surface more readily than the more volatile iron oxide, which could then have mixed into the moon - forming disc (Earth and Planetary Science Letters, DOI: 10.1016 / j.epsl.2010.10.036).

Monico also used high - powered X-rays to analyse microscopic samples from the painting and found that some of the lead chromate at the painting's surface had turned into greenish chromium oxide, which combined with the underlying yellow to produce a darker and browner hue than van Gogh may have intended.

This catalyst has demonstrated specific activity at 10 milliamps per square centimeter of oxide catalyst (OER current normalized to catalyst surface area), with only 270 to 290 millivolts of overpotential for 30 hours of continuous testing in acidic electrolyte.

Meanwhile, Aharon Kapitulnik and colleagues at Stanford University in Palo Alto, California, used a scanning tunneling microscope to study the crystal surface of bismuth strontium calcium copper oxide.

At the Vienna University of Technology, it has now been possible to selectively switch individual oxygen molecules sitting on a titanium oxide surface between a non-reactive to a reactive state using a special force microscope.

In the experiments, oxygen molecules were studied on the surface of a titanium oxide crystal at extremely low temperatures.

Researchers at Umeå University, together with researchers at Uppsala University and Stockholm University, show in a new study how nitrogen doped graphene can be rolled into perfect Archimedean nano scrolls by adhering magnetic iron oxide nanoparticles on the surface of the graphene sheets.

The main dangers associated with elemental mercury are that at standard conditions for temperature and pressure, mercury tends to oxidize forming mercury (II) oxide, and that if dropped or disturbed, mercury will form microscopic drops, increasing its surface area dramatically.

«There is a certain type of doping element that minimizes hydrogen's ability to penetrate, whereas other doping elements can introduce a maximum amount of electrons in the oxide, and facilitate the ejection of hydrogen gas right at the surface of the oxide,» says Mostafa.

A team of researchers from the University of California at Berkeley and the Department of Energy's Lawrence Berkeley National Laboratory (LBNL) deployed an ion gun that sputters, or sprays, oxides through stencil - like masks onto a metal surface.

As Jake Lanphere, a UC Riverside graduate student who co-authored the paper, which was published in the journal Environmental Engineering Science («Stability and Transport of Graphene Oxide Nanoparticles in Groundwater and Surface Water»), explained to Nanoclast in an email interview: «Other studies have looked at ideal lab conditions that do not necessarily reflect the conditions one might find in aquatic environments.

Mavrikakis, assistant scientist Guowen Peng and Ph.D. student Carrie Farberow, along with researchers at Aarhus University in Denmark and Lund University in Sweden, investigated how hydroxyls affect water molecules around them, and how that differs from water molecules contacting a pristine metal oxide surface.

These techniques show that kinetically trapped surface oxide species exist at reducing potentials and confirm that the surface structure changes at different reaction conditions.

In an invited Perspective article in Surface Science, Dr. Scott Chambers of PNNL examines conductivity at the interface of polar and nonpolar complex oxides from outside the reigning paradigm and considers how unintentional dopants and defects, resulting from interfacial mixing, might affect the electronic properties.

When the researchers looked under the microscope at catalyst material formed with alpha - aluminum oxide, platinum atoms formed balls that tottered around on the surface instead of tidy rafts.

Nitrogen, in the form of nitric oxide (one nitrogen atom and one oxygen atom), has been detected for the first time on the surface of Mars by a team of researchers using the Sample Analysis at Mars (SAM) instrument suite aboard NASA's Curiosity rover, adding to the growing speculation that life could have once flourished on ancient Mars.

At the Earth's surface, we humans help create ozone, by providing the precursors like nitrogen oxides and volatile organic compounds, also called VOCs.

Multiple types of spectroscopy and electron microscopy capabilities available at EMSL, the Environmental Molecular Sciences Laboratory, a DOE Office of Science user facility on the PNNL campus, allowed the scientists to understand the catalyst surface at the atomic level and provide mechanistic insight into how oxygen vacancies migrate to the surface of the cerium oxide, creating pathways for highly active carbon monoxide conversion.

Graphene - based materials, prepared from the exfoliation of graphite oxide, are used as a model of interstellar carbon dust as they contain a relatively large amount of atomic defects, either at their edges or on their surface.

Each painting is of similar scale and construct, and the colored surface is created by applying hundreds of coats of paint that he individually mixes using gold, silver, platinum, and diamond dust, and a variety of pigments and oxides on birch board with edges cut at a 45 ° angle and standing off the wall.

I am continually amazed at the lack of discussion of obvious things, like the growing optical density of the global nitrous oxide haze, and the tendency of jet contrails to bloom into clouds, that visibly reduce the light energy arriving at the Earth's surface.

At the Earth's surface, we humans help create ozone, by providing the precursors like nitrogen oxides and volatile organic compounds, also called VOCs.

«Prior to our study, it was not known whether the catalysis, which takes place on the surface of the cobalt oxide crystallites, happens at every cobalt center on the surface at the same speed, or whether a subset of cobalt sites does most of the work while other subsets are slow or merely spectators, Frei says.