Sentences with phrase «ruthenium catalysts»

The process requires platinum, rhenium and ruthenium catalysts, in the shape of sand or gravel pellets, all of which are expensive and rare.

Nevertheless, Meyer's experiment with the ruthenium catalyst, the first to do photosynthesis in its entirety, is a potentially big practical breakthrough.

For instance, Meyer's ruthenium catalyst is not very energy efficient when it comes to splitting carbon dioxide.

Carbon dioxide - laden water from a fossil - fuel plant would pass across ruthenium catalyst membranes, which would trigger artificial photosynthesis, breaking it down into oxygen as well as constituents that can be converted to fuel.

And by the way, adding a copper - coated ruthenium catalyst can also convert the HMF to DMF (2,5 - dimethylfuran), a fuel that provides more energy than ethanol.

Not exact matches

To accomplish this, they used compounds of the chemical element ruthenium as a catalyst.

But the cost of producing it by using electricity to split water is high, because the most efficient catalysts developed so far are often made with precious metals, like platinum, ruthenium and iridium.

This is a TEM image of CeO2 - supported ruthenium nanoparticles catalyst.

«As a next step, I deposited nanoparticles of ruthenium dioxide, a catalyst,» Azarpira explains.

First, they reacted their pyrolysis oils with hydrogen over a ruthenium and platinum catalyst, which stripped out much of the oxygen from the acids and added hydrogen.

Rice University scientists have fabricated a durable catalyst for high - performance fuel cells by attaching single ruthenium atoms to graphene.

They added a ruthenium metal catalyst and exposed the mix to bright white light, causing the resilin proteins to bond together in the correct conformation.

«Ruthenium is often a highly active catalyst when fixed between arrays of four nitrogen atoms, yet it is one - tenth the cost of traditional platinum,» Tour said.

Meyer, a chemist at University of North Carolina at Chapel Hill and director of its Energy Frontier Research Center in Solar Fuels, noticed that two separate groups of researchers working on two separate parts of the photosynthetic reaction happened to be using the same class of catalyst — ones with an atom of the metal ruthenium surrounded by organic molecules.

The borohydride solution releases its hydrogen as it flows over a catalyst made of ruthenium.

Although much progress has been made in recent years in the development of catalysts devoid of noble metals, photosensitizers still rely, in the main, on molecular compounds containing rare and costly metals, such as ruthenium and iridium, or on inorganic semiconductor materials containing cadmium, a toxic metal.

For CO2 hydrogenation purposes, most known catalysts are based on precious metals such as iridium, rhodium or ruthenium.

Working with Artur Ionescu of the Babes - Bolyai University in Cluj - Napoca, Romania, he has shown that ruthenium, a rare metal found in the igneous rocks beneath the site, can act as a catalyst, allowing methane to form in the lab at temperatures below 100 °C — similar to the temperatures at Yanartas (Geofluids, DOI: 10.1111 / gfl.12106).