UNIST scientists have developed an exiting new catalyst that can split water into hydrogen almost as good as platinum, but less costly and found frequently on Earth.
As described in the journal Nature Nanotechnology, this ruthenium (Ru)-based material works almost as efficient as platinum and likely shows the highest catalytic performance without being affected by the pH of the water.
The research team, led by Professor Jong-Beom Baek of the Energy and Chemical Engineering at UNIST has synthesized Ru and C?N, a two-dimensional organic structure, to verify its performance as a water-splitting catalyst. With the aid of this new catalyst, entitled [email protected] it is now possible to efficiently produce hydrogen.
The technology for producing hydrogen from water requires a good catalyst for commercial competitiveness. These water-splitting catalysts must exhibit high hydrogen conversion efficiency and excellent durability, operate well under low-voltage, and should be economical.
The Pt-based catalysts used in the hydrogen generation reaction are highly expensive noble metals, resulting in additional costs and difficulty of mass production. They are also less stable in an alkaline environment.
One solution, many researchers suggest, was to build catalysts made of cheap, non-noble metals. However, because these materials corrode rapidly under acidic condition and operate at very-high voltages, productivity was limited.
The [email protected]?N, developed by Professor Baek is a high-performance material that satisfies all four commercial competitiveness of water-splitting catalysts.
This material exhibits high turnover frequency (TOF) as high as Pt and can be operated on low-voltage supply. In addition, it is not affected by the pH of the water and can be used in any environment.
The synthesis process of [email protected] is simple. Professor Baek and his colleagues simply mixed the ruthenium salt (RuCl?) with the monomers which forms the porous two-dimensional organic structure, C?N. The [email protected] catalyst is then produced after going through reduction and heat treatment processes.
The researchers used the same process to build [email protected] (M = Co, Ni, Pd, Pt) catalysts, using cobalt (Co), nickel (Ni), lead (Pb) and platinum (Pt). When comparing their efficiency of hydrogen production, the [email protected] catalyst exhibited the highest catalytic performance at the lowest overvoltage, as well as superior catalytic activity.
“Our study not only suggests new directions in materials science, but also presents a wide range of possibilities from basic to applied science,” says Professor Baek. “This material is expected to attract attention in many areas thanks to its scientific potential.”
Receive an email update when we add a new WATER SPLITTING article.
The Latest on: Water splitting
via Google News
The Latest on: Water splitting
- Breaking water molecules apart to generate clean fuel: Investigating a promising materialon October 17, 2019 at 7:52 am
Among the many techniques being investigated to generate clean energy, water splitting is a very promising one. In particular, water (H 2 O) can be split to obtain dihydrogen (H 2) by using solar ...
- Splitting water to make cement could clean up a dirty industryon September 17, 2019 at 9:02 am
Instead of burning fuel to heat a calciner to about 900°C (needed to liberate calcium oxide from CaCO 3), they used electricity to split water. Electrolysis takes water and produces pure hydrogen and ...
- IISER faculty gets US Patent for work on water splittingon July 29, 2019 at 7:53 am
PUNE: R Vaidhyanathan's work on 'preparation of a covalent organic framework (COF) that can serve as an electrocatalyst to split water' has won him a US patent. He is a faculty member at Indian ...
- Multishelled fullerenes beat graphene at catalysing water splittingon July 5, 2019 at 4:32 am
An all-round strong performer. Experiments and simulations suggest that electric field enhancements help curved carbon structures decorated with platinum atoms perform better as catalysts in water ...
- Magnet doubles hydrogen yield from water splittingon June 14, 2019 at 3:15 pm
Chemistry matters. Join us to get the news you need. Yes! I want to get the latest chemistry news from C&EN in my inbox every week. ACS values your privacy. By submitting your information, you are ...
- TUM develops water splitting catalyston May 16, 2019 at 10:16 pm
Chemists at the Technical University of Munich (TUM) have developed an efficient water splitting catalyst. The catalyst comprises a double-helix semiconductor structure encased in carbon nitride. It ...
- Bengaluru researchers develop superior, low-cost catalyst for water-splittingon May 9, 2019 at 8:36 am
BENGALURU: In a significant step towards large-scale hydrogen production, researchers at the Indian Institute of Science (IISc) have developed a low-cost catalyst that can speed up the splitting of ...
- Novel Batteries are First to Use Water-Splitting Technology at Their Coreon April 16, 2019 at 9:50 am
Now, MIT Lincoln Laboratory and the MIT Department of Materials Science and Engineering have made headway in developing nanoscale hydrogen batteries that use water-splitting technology. With these ...
- Water-splitting system pulls green fuel from seawateron March 19, 2019 at 7:23 am
The findings demonstrate a new way of separating hydrogen and oxygen gas from seawater via electricity. Existing water-splitting methods rely on highly purified water, which is a precious resource and ...
via Bing News