Chinese scientists have developed a new, highly efficient electrode that rapidly ejects gas bubbles during water electrolysis. The results were striking: the three-dimensional, plant-inspired design yielded up to 172.1% more hydrogen than standard flat electrodes of the same size.
Published in the International Journal of Extreme Manufacturing , the system proved capable of running continuously outdoors for a week on solar power.
Hydrogen fuel is considered a vital clean energy source for the future. But producing it by splitting water faces a stubborn physical hurdle: the hydrogen bubbles generated tend to stick to the electrode's surface.
No matter how advanced the catalyst is, these trapped bubbles block the liquid from reaching the reaction sites, creating dead zones that severely stall production. Identical electrodes in a factory electrolyzer will eventually lose efficiency as bubbles accumulate within their structural networks. Scientists know that clearing these blockages is essential, but doing so without disrupting the continuous surface of the electrode has remained incredibly difficult.
One-way street
To solve this, researchers turned to Myriophyllum verticillatum , an aquatic plant that efficiently channels oxygen bubbles to the tips of its leaves. The engineering team replicated this biological trick by combining a wavy and 3D-printed catalytic base with a specialized functional membrane.
Using projection microstereolithography, a high-precision 3D printing technique, they crafted a "Janus" membrane, a material that features a gradient wettability designed to capture and transport gas. When the electrode generates a hydrogen bubble, the membrane acts like a one-way turnstile. It actively grabs the bubble and pulls it through to the collection side in just six milliseconds, instantly exposing the reaction site to fresh water.
Factory ready
The rapid detachment speeds translate directly into massive performance gains. During testing, the 3D electrode achieved a current density eight times higher than common one-dimensional flat electrodes, and 2.5 times greater than that of two-dimensional curved versions at the same voltage. Because the wavy 3D geometry ensures the gas meets almost zero resistance as it detaches, the system collected 53.9% more hydrogen than a 2D electrode and 172.1% more than a flat 1D electrode with the exact same active catalyst area.
To prove the technology can handle industrial demands, the team scaled their design into a 400-square-centimeter panel reactor. Coupled directly to a commercial solar panel and placed outdoors, the system maintained highly stable hydrogen production over a continuous one-week run.
Because this modular, stackable architecture operates efficiently in an open liquid setup without requiring expensive proton exchange membranes, the researchers suggest it provides a highly simplified and durable blueprint for large-scale commercial green hydrogen manufacturing.
International Journal of Extreme Manufacturing (IJEM, IF: 21.3 ) is dedicated to publishing the best advanced manufacturing research with extreme dimensions to address both the fundamental scientific challenges and significant engineering needs.
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International Journal of Extreme Manufacturing
Bionic stacked 3D engineered functional electrodes for ultra-high efficient hydrogen production
11-Mar-2026