New research shows that sound can improve hydrogen production

Norwegian University of Science and Technology (NTNU) researchers have found that sound can drastically improve hydrogen production through water electrolysis.

Alkaline water electrolysers (AWE) and proton exchange membrane water electrolysers (PEMWE) are currently the most commercially available and used electrolysers for producing hydrogen, as they both offer many advantages such as: well-established technologies, ease of use, compact system design, quick response, high dynamic operations, high current densities, great hydrogen production rate of acceptable purity (99.99+%) and fairly high energy efficiencies (<90%).

However, cost, efficiency, and durability need to be further improved. To add to these, they both suffer from molecular hydrogen (and oxygen) bubble accumulation and adhesion (“stickiness”) at the water electrolyser electrode surfaces, and in the electrolyte (solution) flowing in the flow channels, leading to a high ohmic voltage drop (resistance) and a large reaction overpotential in turn yielding high operational energy consumption and costs.

Professor Pollet, Mr. Islam and Dr. Emberson, researchers at the Hydrogen Energy and Sonochemistry Research Labs, at the Norwegian University of Science and Technology, however, found that sound could improve the process.

... to continue reading you must be subscribed

Subscribe Today

Paywall Asset Header Graphic

To gain access to this article and all our other content, you will need to subscribe to H2 View.

From the latest print editions, to 24/7 online access to exclusive interviews, authoritative columnists and the H2 View news archive, a subscription is the best way for you to stay up to date with developments in the hydrogen community.

Please wait...