Sentences with phrase «oxide surface»

If and how water (H2O) breaks when it hits a metal oxide surface, such as a catalyst or a pipe, matters.

The results provide atomic - scale verification of a general mechanism originally proposed by Mars and van Krevelen in 1954 and are likely to be of general relevance for the mechanism of catalytic reactions at oxide surfaces.

The behavior of individual hydrogen atoms on titanium oxide surface reveals intriguing details about a popular oxide catalyst

This discovery of these fast and slow sites and the proposed structural difference between two provides the basis for designing cobalt oxide surfaces with higher concentrations of fast sites.»

For years he has been studying the behaviour of tiny particles on metal - oxide surfaces together with Professor Ulrike Diebold (both TU Vienna).

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.

Mobile platinum oxide species trapped on a cerium oxide surface.

Yamaguchi believes that deuterium ions migrate towards the palladium oxide surface of the plate because of differences in temperature and density.

An electrochemical reduction produces tiny indium nanoparticles on the indium tin oxide surface, which act as sites for the nucleation and crystallization of germanium nanowires.

The researchers customized the anode by growing the iridium oxide nanotubes on a zinc oxide surface to create a more uniform surface area to better support chemical reactions.

«We've been able to specifically identify an important site for the anchoring of platinum on the aluminum oxide surface that's formed during synthesis,» said PNNL chemist Chuck Peden and coauthor of the study.

In this way, the scientists determined which structures on the vanadium oxide surface do the best job of initiating and sustaining reactions.

The latter act as coordinatively unsaturated sites — a hypothesis introduced long ago to account for the catalytic activity of oxide surfaces — onto which carbon monoxide can chemisorb and from where it can react with neighboring lattice - oxygen to carbon dioxide.

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

As soon as the chemical reaction at the platinum nanoparticle creates a hole in the iron - oxide surface, there are some atoms right at the edge of the hole whose coupling to the rest of the material is not very strong.

When the platinum nanoparticles catch molecules from the surrounding gas and combine them with oxygen atoms from the iron - oxide surface, a surplus of iron atoms remains.

Surprisingly, the chemical reactions do not take place on the platinum nanoparticles themselves, and it is the interplay between platinum particles and the iron - oxide surface that makes the reaction so efficient.

The authors used data from infrared spectroscopy and thermogravimetry to identify the strength of the interaction between the probe and the oxide surface, which also helped them determine the type of bonding to the surface.

The other strategy is based on different elements, including niobium, that propel hydrogen out of the oxide surface and protect the underlying zirconium alloy.

5 sessions run in parallel for the whole week to cover a broad range of topics from graphene to molecules on surfaces, from surface magnetism to oxide surfaces and interfaces.

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.

Chemists working with gamma - aluminum oxide supports and platinum metal knew that under some conditions, rafts of platinum atoms could form on the oxide surface.

We are also using molecular beam scattering instrumentation to study physisorption and chemisorption on oxide surfaces.

For example, they found that the oxide surface influences the water molecules from relatively far away, which means a few molecular lengths in this case.

Methods: Directly measuring the amount of energy needed to split bonds inside a water molecule when it hits an oxide surface was a major challenge.