The use of seawater as an energy source is once again at the center of scientific debate. Researchers from the University of Sydney. They have developed a system capable of generating clean hydrogen through a chemical reaction using gallium and sunlight, opening up new possibilities for the production of sustainable fuels.
Currently, saltwater represents about 97% of the Earth’s hydrosphere, making the oceans a potentially invaluable resource for the development of energy technologies based on accessible and abundant resources.
The role of gallium in the generation of clean hydrogen
The advance is based on the use of gallium Hydrogen, a metal with a low melting point that can remain liquid at near-ambient temperatures. When it comes into contact with water and is exposed to solar radiation, this material triggers a chemical reaction that releases hydrogen.
Unlike traditional methods, such as electrolysis, this system significantly reduces energy consumption. It also eliminates the need for purified water, representing a significant improvement in terms of technical and economic feasibility.
A reusable and more efficient process
One of the most outstanding aspects of the development is the ability to reuse the gallium after the reaction. Once the hydrogen is released, the material can be regenerated and used again in subsequent cycles, which helps to optimize the process and reduce waste.
According to the research team, led by Luis Campos, the system allows for the sustainable extraction of hydrogen using seawater and relying solely on light. This approach strengthens the feasibility of producing green hydrogen without depending on complex infrastructure or limited inputs.
Current limitations and future projections
Despite its potential, the technology is in an experimental phase; tests have achieved an efficiency of 12.9%, a figure that still needs improvement for industrial-scale application.
However, this progress marks a clear direction towards new energy production models. In this context, Australia could position itself as a relevant player in the development of a hydrogen-based economy, especially if it manages to scale up this technology in the coming years.
Fountain: Eleconomista
Photo: Shutterstock