Sentences with phrase «cobalt catalyst»

That's what it feels like for scientists reading the reaction that uses a cobalt catalyst to produce hydrogen.

Wiedner and Bullock focused on a cobalt catalyst and how it forms bonds with hydrogen atoms and shuffles electrons.

With the metal - insulator - semiconductor solar cell directly connected to the water - splitting oxidized cobalt catalyst, water was efficiently split into oxygen with exposure to sunlight.

While this work wraps up a series of studies on cobalt catalysts done at the Center for Molecular Electrocatalysis, it marks the start of showing how scientists can use these electrochemistry techniques on other catalysts.

Not exact matches

In the end, Liu replaced the original system's problem catalysts — which made a microbe - killing, highly reactive type of oxygen molecule — with cobalt - phosphorus, which didn't bother the bacteria.

However, this required the use of a relatively costly cobalt acetate catalyst, which could make the process prohibitively expensive if scaled up.

Graphene doped with nitrogen and augmented with cobalt atoms has proven to be an effective, durable catalyst for the production of hydrogen from water, according to scientists at Rice University.

But this solution of cobalt oxide could be a major step forward in finding an efficient catalyst for photosynthesis.

Cobalt atoms shine in an electron microscope image of a new catalyst for hydrogen production invented at Rice University.

That voltage is also higher than what is needed to induce the cobalt to precipitate out of the solution and form the cobalt phosphide catalyst, which means when the bionic leaf is running there are always enough electrons around to induce the catalyst's formation — and therefore no excess metal left to poison the microbes or bring the bionic leaf's water - splitting to a halt.

With a little charge, this new catalyst can assemble itself out of a solution of regular water, cobalt and phosphate — and phosphate in water actually is good for living things like the Ralstonia eutropha bacteria that make up the back half of the bionic leaf.

Here, we report that cobalt nanoparticles encapsulated by a graphitic shell are broadly effective reductive amination catalysts.

The Leiden physicists were able to explain these findings with a simple theory, in which the catalyst constructs the molecules step - by - step at the atomic steps on the cobalt surface.

Sulfurous fractions are mixed with hydrogen and a cobalt - molybdenum catalyst, yielding hydrogen sulfide.

Nocera and his postdoctoral student, Matthew Kanan, discovered that cobalt (a widely available metal) can be used to create a catalyst that similarly splits water molecules — in this case, in the presence of an electric current.

Massachusetts Institute of Technology chemist Dan Nocera is developing cobalt - based catalysts that split water.)

These new catalysts are produced through the simultaneous control of the: 1) composition, 2) size and 3) crystallinity of metal oxides of earth - abundant elements such as iron, cobalt and nickel.

This is a rechargeable zinc - oxide battery in a tri-electrode configuration with cobalt - oxide / carbon nanotube and iron - nickel / layered double hydroxide catalysts for charge and discharge, respectively.

Why was cobalt chosen as a possible water splitting catalyst?

A team of researchers led by University of Amsterdam (UvA) chemists has developed new Fischer - Tropsch catalysts — consisting of ultra-thin cobalt shells surrounding inexpensive iron oxide cores — that can be used to produce synthetic fuels from natural gas and biomass.

In addition to determining the four - step process, where cobalt changes its electronic structure several times, this research helps scientists with the nuances of building better catalysts.

With this knowledge, we can devise and design improvements on the cobalt oxide catalyst and its support environment to partially or completely remove these bottlenecks and improve the efficiency of water oxidation.»

Nano - sized crystals of cobalt oxide, an Earth - abundant catalyst, have been shown to be able to effectively carry out the critical photosynthetic reaction of splitting water molecules.

The first direct, temporally resolved observations of intermediate steps in water oxidation using cobalt oxide, an Earth - abundant solid catalyst, revealed kinetic bottlenecks whose elimination would help boost the efficiency of artificial photosynthesis systems.

Frei, Zhang and de Respinis have reported their findings in the journal Nature Chemistry in a paper titled «Time - resolved observations of water oxidation intermediates on a cobalt oxide nanoparticle catalyst.»

«We've obtained the first direct, temporally resolved observation of two intermediate steps in water oxidation using an Earth - abundant solid catalyst, cobalt oxide, that allowed us to identify the kinetic bottlenecks.

Cobalt has uses in catalysts, teeth implants and medical radiation therapy but quantities used are small.

The photothermocatalytic process for the synthesis of hydrocarbons — including liquid alkanes, aromatics, and oxygenates, with carbon numbers (Cn) up to C13 — ran in a flow photoreactor operating at elevated temperatures (180 — 200 °C) and pressures (1 — 6 bar) using a 5 % cobalt on TiO2 catalyst and under UV irradiation.

A team of researchers led by University of Amsterdam (UvA) chemists has developed new Fischer - Tropsch catalysts — consisting of ultra-thin cobalt shells surrounding inexpensive iron oxide cores — that can be used to produce synthetic fuels from natural gas and biomass.

The new JCAP photocathode construct consists of the semiconductor gallium phosphide and a molecular cobalt - containing hydrogen production catalyst from the cobaloxime class of compounds.

«Photofunctional Construct That Interfaces Molecular Cobalt - Based Catalysts for H2 Production to a Visible - Light - Absorbing Semiconductor.»