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Related: About this forumDirect electrolysis systems turns waste alkaline water into clean hydrogen

Anion exchange membrane water electrolysis for clean hydrogen production by directly utilizing waste alkaline water generated in industry. Credit: Korea Institute of Materials Science (KIMS)
Direct electrolysis systems turns waste alkaline water into clean hydrogen
National Research Council of Science & Technology | July 21, 2025
Dr. Sung Mook Choi and his research team at the Energy & Environmental Materials Research Division of the Korea Institute of Materials Science (KIMS) have successfully developed a highly durable non-precious metal-based hydrogen evolution catalyst for use in a direct electrolysis system employing waste alkaline water and anion exchange membranes (AEM). This breakthrough enables the production of clean hydrogen by directly utilizing alkaline wastewater generated from industrial processes.
Notably, the developed catalyst was applied to a commercial-scale 64 cm² single-cell electrolysis system and demonstrated high hydrogen production efficiency with less than 5% performance degradation even after more than 2,000 hours of continuous operationshowing strong promise for real-world application.
Waste alkaline water is generated in large volumes from semiconductor manufacturing and metal etching/cleaning processes. However, due to the high cost of treatment and the potential environmental hazards, its reuse has remained economically inefficient.
Anion exchange membrane water electrolysis (AEMWE) is considered a suitable method for directly utilizing waste alkaline water without the need for separate purification. Nonetheless, impurities and ions contained in the waste water have long interfered with the electrochemical reactions during electrolysis, significantly reducing hydrogen production efficiency...more
https://techxplore.com/news/2025-07-electrolysis-alkaline-hydrogen.html

NNadir
(36,191 posts)...is a trivial, expensive, and unsustainable route to hydrogen, although I certainly understand that the marketing effort of the fossil fuel industry likes to market it as a "thing."
More than 98% of the hydrogen produced on this planet (for captive use) is produced by the steam reformation of the dangerous fossil fuels, which is, of course, the reason the fossil fuel industry advertises hydrogen claiming, dishonestly, that it's "green."
As is the case with all hydrogen bullshit, electrolysis is a thermodynamic nightmare, even worse than steam reforming since electricity is already thermodynamically degraded, and despite the regular hype about precious metal free electrodes, electrolysis remains restricted by the materials requirements, despite decade upon decade upon decade of "breakthroughs."
The "breakthrough" meme was tiresome all through the late 20th century, and is even worse and more stupid and dishonest in the 21st.
Think. Again.
(22,412 posts)...GREEN Hydrogen is produced only from non-fossil fuel energy sources makng it an inexpensive (clean tech is cheaper than FF tech now) and extremely sustainable solution to the storage of intermittently produced wind and solar.
More than 98% of the hydrogen produced on this planet (for captive use) is produced by the steam reformation of the dangerous fossil fuels, which is, of course, the reason we need to hasten the build-out of all non-CO2 emitting energy production.
As is the case with all fossil fuel bullshit, electrolysis actually has nothng to do with thermodynamics, as it is produced and transfers it's energy without the wasted heat energy of fossil fuels and despite the regular hype about needing precious metal electrodes, electrolysis is no longer restricted by the materials requirements, thanks to the recent decade of "breakthroughs."
The fossil fuel marketing lie that there is no other possible source of energy than fossil fuels or nuclear was tiresome all through the late 20th century, and is even worse and more stupid and dishonest in the 21st.