Sentences with phrase «catalyst particles»
"Catalyst particles" refers to tiny substances that speed up a chemical reaction without being consumed in the process. They help to initiate and enhance the reaction, enabling it to occur more efficiently. Full definition
This is an electron micrograph and atomistic model (bottom right) of a highly oxygen - activating platinum - nickel catalyst particle.
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«The advantage of this approach is that we can map how different synthesis parameters, such as temperature and catalyst particle size, influence how nanotubes form while simultaneously testing the resulting CNT forests for how they will behave in one comprehensive simulation,» Maschmann said.
A composite image shows a scanning transmission electron microscope view of an antenna - reactor catalyst particle (top left) along with electron energy loss spectroscopy maps that depict the spatial distribution of individual plasmon modes around the palladium islands.
«Unfortunately, many of the residual catalyst particles are surrounded by a carbon layer that stops the chlorine from reacting, and this is a problem for making high - purity carbon nanotubes.»
Today, most nanotubes are grown with the help of vanishingly small catalyst particles that help carbon atoms in a vapor develop into tiny tubes.
The single catalyst particles have, however, an ugly tendency to cluster into larger particles, thereby reducing their effectiveness.
With the aid of state - of - the - art electron microscopy, the researchers discovered that the function of the nanometre - scale catalyst particles is decisively determined by their geometric shape and atomic structure.
Scientists from Forschungszentrum Jülich and Technische Universität Berlin have succeeded in developing efficient metallic catalyst particles for converting hydrogen and oxygen to water using only a tenth of the typical amount of platinum that was previously required.
«Both of the intra-particle and inter-particle effects we saw represent first - of - their kind observations involving individual nanocatalysts and our results provide a new sort of conceptual framework for understanding how a nanoscale catalyst particle works.»
New staining method enables imaging of function of individual FCC catalyst particles; tool for optimizing and designing cracking catalysts for petroleum refining
Emissions would be among the lowest thanks to a new catalyst that more effectively removes harmful exhaust materials by employing single - nanotechnology to control catalyst particles that are smaller even than those controlled by conventional nanotechnology.
Electron micrograph and atomistic model (bottom right) of a highly oxygen - activating platinum - nickel catalyst particle.
These plasmon modes are responsible for capturing light energy and transferring it to the catalyst particles.
As a result, virtually all of the catalyst particles remained active and quickly produced a forest of nanotubes growing up from a surface.
When Hata tuned his apparatus to add about 100 parts per million of water to hydrocarbons — the source of the carbon for the growing tubes — and other inert carrier gases, the water reacted with the amorphous carbon from the catalyst particles but didn't damage the growing nanotubes.
Yet, most of these catalysts stop working after just a minute of operation as carbon atoms cover the catalyst particles with an amorphous coating that prevents nanotubes from taking shape.
«This pioneering experimental work provides direct evidence for the fact that the choice of the correct geometric shape for the catalyst particles is as important for optimizing their function as the choice of their composition and size,» says Prof. Peter Strasser from Technische Universität Berlin.
They placed these catalyst particles on a grid and inside a specialized cell.
«For every reaction occurring on a catalyst particle, we now know where it happened and when it happened,» he explains.