Sentences with phrase «water splitting catalyst»

Schematic of the multi-functional water splitting catalyst layer engineered using atomic layer deposition for integration with a high - efficiency silicon cell.

Why was cobalt chosen as a possible water splitting catalyst?

Not exact matches

UNSW Sydney chemists have invented a new, cheap catalyst for splitting water with an electrical current to efficiently produce clean hydrogen fuel.

In an engineering first, Cui and his colleagues used lithium - ion battery technology to create one low - cost catalyst that is capable of driving the entire water - splitting reaction.

«Our hope is that this technique will lead to the discovery of new catalysts for other reactions beyond water splitting.»

«Compared to other water - splitting electro - catalysts reported to date, our catalyst is also among the most efficient,» he says.

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.

«Splitting water usually requires two different catalysts, but our catalyst can drive both of the reactions required to separate water into its two constituents, oxygen and hydrogen,» says study leader Associate Professor Chuan Zhao.

So the team set out in search of a better catalyst, one that would play well with living organisms while effectively splitting water.

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.

To understand the important interfaces in a solar cell connected to a water - splitting catalyst, researchers from Missouri University of Science & Technology developed a method to simply and controllably produce such a system.

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.

An oxygen - evolution catalyst splits water into hydrogen and oxygen.

Rice University scientists have created an efficient, simple - to - manufacture oxygen - evolution catalyst that pairs well with semiconductors for solar water splitting, the conversion of solar energy to chemical energy in the form of hydrogen and oxygen.

A nanostructured composite material developed at UC Santa Cruz has shown impressive performance as a catalyst for the electrochemical splitting of water to produce hydrogen.

Currently, electrolyzers (machines that split water into its constituent hydrogen and oxygen) need a catalyst, namely platinum, to run; ditto fuel cells to recombine that hydrogen with oxygen, which produces electricity.

Titanium - based semiconductors are particularly popular as catalysts for solar water - splitting reactions to produce hydrogen, a clean renewable - energy source.

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.

The compound belongs to a class of highly conductive materials previously recognized as efficient water - splitting catalysts in liquid.

The researchers discovered a new class of cheap and efficient catalyst to facilitate the water splitting process.

These «descriptors» were then used to computationally screen MX2 candidates that could make better water - splitting catalysts.

To solve the problem, Wood and lead author Yuanyue Liu — a Livermore summer intern with Wood — turned to a class of catalysts based on transition - metal dichalcogenides (MX2), which have generated a great deal of interest for water splitting.

University of Houston physicists have discovered a catalyst that can split water into hydrogen and oxygen, composed of easily available, low - cost materials and operating far more efficiently than previous catalysts.

«New, more efficient catalyst for water splitting: Discovery could remove hurdle to producing hydrogen from water.»

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

One group used this type of catalyst to split water into hydrogen and oxygen; the other one was splitting carbon dioxide into carbon monoxide and oxygen.

An applied electric current splits the water into hydrogen and oxygen, and under the right conditions, lithium or potassium then acts as a catalyst to absorb energy and collapse hydrogen's electron orbit.

Splitting hydrogen from water: This illustration depicts the synthesis of a new hydrogen - production catalyst from soybean proteins and ammonium molybdate.

A hybrid nanomaterial comprising carbon and nitrogen proves a robust catalyst for light - driven water splitting into H2 and O2.

The team has now overcome this problem by developing a new catalyst for the first reaction — the one that splits water into protons and oxygen gas.

Jaramillo and his collaborators sought to develop a catalyst for the oxygen evolution reaction, the notoriously slow half of the water - splitting process.

Understanding these effects is also important for other applications such as splitting water molecules to produce hydrogen at solid - liquid interfaces, electronic devices that rely on oxide - oxide interfaces, or other electrochemical processes using these materials as catalysts, where defects serve as the sites that enable the interactions.

A film of high - surface - area nickel foam coated with graphene and a compound of iron, manganese and phosphorus serve as a water - splitting catalyst that can produce hydrogen and oxygen simultaneously.

«Robust catalyst to split water into hydrogen, oxygen produced.»

A few years ago, researchers led by Harvard University chemist Daniel Nocera devised what they call an artificial leaf that uses a semiconductor combined with two different catalysts to capture sunlight and use that harvested energy to split water molecules (H2O) into H2 and oxygen (O2).

«Our method could be widely applicable to a large number of metal phosphide materials for catalysts — not just for water splitting, but for a range of things,» he said.

Splitting water into hydrogen and oxygen to produce clean energy can be simplified with a single catalyst developed by scientists at Rice University and the University of Houston.

Many, many investigators have contributed over the years to the development of a form of artificial photosynthesis in which sunlight - activated catalysts split water molecules to yield oxygen and hydrogen — the latter being a valuable chemical for a wide range of sustainable technologies.

Another problem is that most catalysts channel more of the available electrons into splitting water rather than converting CO2 to CO..

L.M. Petkovic, D.M. Ginosar, H.W. Rollins, K.C. Burch, P.J. Pinhero, H.H. Farrell, «Pt / TiO2 (Rutile) Catalysts for Sulfuric Acid Decomposition in Sulfur - Based Thermochemical Water - Splitting Cycles,» Applied Catalysis A: General, 338 (2008) 27 — 36.

Because producing oxygen from splitting water is a barrier to using artificial photosynthesis (the splitting of water into H ₂ and O ₂ as a renewable energy, many research programs focus on designing catalysts that assist with this oxygen - producing step.

Daino, Trevor Grade: 8 Metrolina Regional Scholars Academy - Waxhaw, NC Project Title: Investigating Tantalate Catalysts for Photocatalytic Water Splitting

D.M. Ginosar, L.M. Petkovic, A.W. Glenn, K.C. Burch, «Stability of supported platinum sulfuric acid decomposition catalysts for use in thermochemical water splitting cycles,» International Journal of Hydrogen Energy, 32, 482 - 488, 2007.

That is completely at odds with the characteristics of an efficient catalyst, which helps to split water to store the energy of light in chemical bonds,» said Sharp, who is also a staff scientist at Berkeley Lab's Chemical Sciences Division.

Going back to Equation 1, as mentioned above, catalysts are needed to efficiently split water because all water - splitting schemes require the inefficient step of producing oxygen.

These resources will give you more information about catalysts, renewable energy, and water splitting:

Capabilities for catalyst synthesis and characterization can lead to the advancement of thermochemical water splitting cycles.

Scientists have found a way to engineer the atomic - scale chemical properties of a water - splitting catalyst for integration with a solar cell, and the result is a big boost to the stability and efficiency of artificial photosynthesis.

The same catalyst they developed to split carbon dioxide also appeared to work for the oxidation of water, which is necessary to complete the reduction.

It will focus on catalyst development for four applications: proton exchange membrane fuel cells to convert stored energy in non-fossil fuels into electricity; electrolysers for splitting water into oxygen and hydrogen — a potential clean fuel cell source; syngas, a mixture of CO and H2, which is generated from coal, gas and biomass, and widely used as a key intermediate in the chemical industry; and lithium - air batteries.