Gas bubbles form as researchers use a unique catalyst to convert water to hydrogen and oxygen. The inset image shows the catalytic materials at the nanoscale. Credit: Washington State University
Â
WSU researchers have found a way to more efficiently create hydrogen from water – an important key in making renewable energy production and storage viable. The researchers, led by professors Yuehe Lin and Scott Beckman in the School of Mechanical and Materials Engineering, have developed a catalyst from #low #cost materials. It performs as well as or better than catalysts made from precious metals that are used for the process. Energy conversion is a key to the clean energy economy. Because solar and wind sources produce power only intermittently, there is a critical need for ways to store and save the electricity they create.
Â
One of the most promising ideas for storing renewable energy is to use the excess electricity generated from renewables to split water into oxygen and hydrogen; the hydrogen can then be fed into fuel–cell vehicles. “Hydrogen production by electrolysis of #water is the greenest way to convert electricity to chemical fuel,” said Junhua Song, a WSU Ph.D. Industries have not widely used the water splitting process, however, because of the prohibitive cost of the precious metal catalysts that are required – usually platinum or ruthenium. Instead, industries generally use a fossil-fuel based process to produce H2 for fuel cells, which generates harmful greenhouse gas emissions.
Â
For their catalyst, the team added nanoparticles of relatively inexpensive #copper to a cobalt-based framework. The new catalyst was able to conduct electricity better than the commonly used precious metal catalysts. It produced oxygen better than existing commercial catalysts and produced hydrogen at a comparable rate. They used both theoretical modeling and experimental assessments to demonstrate and fine tune their catalyst’s effectiveness. “The modeling helped the researchers gain understanding at the atomic level of how the copper atoms improve the catalyst, which helped in precisely choosing and tuning the elements to #enhance #performance,” said Beckman.
Â
“The research team has provided a new perspective in designing and improving non-precious metal-based catalysts for hydrogen production,” said Lin. “This catalyst will pave the way for the development of high-performance, electrolysis-based hydrogen production applications.”
Recent Comments