Researchers at RMIT University in Melbourne, Australia, have developed a new method to produce green hydrogen using sound waves. Hydrogen is produced by splitting water molecules into oxygen and hydrogen through electrolysis. However, the process is usually inefficient and requires expensive platinum electrodes and alkaline or acidic electrolyte solutions. The new method uses neutral electrolytes and cheaper electrode materials, and the researchers found that high-frequency sound waves can significantly increase the efficiency of the process. The sound waves prevent gas bubbles from forming on the electrodes, which improves their conductivity and stability. The researchers also found that the sound waves loosen or break the hydrogen bonds in water molecules, making it easier to extract hydrogen from water. The technology could lead to a more efficient and cost-effective way to produce green hydrogen without the need for corrosive electrolytes and platinum electrodes.
The researchers developed an electrochemical reaction cell using piezoelectric material lithium niobate, which can generate high-frequency sound and surface waves in the liquid medium. They used sodium phosphate as the electrolyte and found that the vibrations in the liquid medium increased the hydrogen yield of the electrolysis system by 14 times. The researchers are now working on optimizing the vibration module and integrating it into conventional electrolysis systems. They believe that their approach is a practical and cost-effective way to produce green hydrogen using cheap and widely available electrodes. The technology could help to reduce the cost of producing green hydrogen, which is a key component of the transition to a low-carbon economy.
In conclusion, the new method developed by the researchers at RMIT University could revolutionize the production of green hydrogen. The use of sound waves to increase the efficiency of the electrolysis process could lead to a more cost-effective and sustainable way to produce hydrogen. The technology could help to reduce the cost of producing green hydrogen, which is essential for the transition to a low-carbon economy. The researchers are optimistic about the potential of their approach and are working to further optimize the technology for commercial use.
