Using copper-based catalysts and the organic molecule hydroxymethylfurfural to produce hydrogen on both sides of the membrane

https://secom.es/electrochemical-water-splitting-breakthrough-slash-hydrogen-costs-discovery

"makes green hydrogen cost-competitive with fossil fuels... significantly lower voltages, >80% energy efficiency (was 65%)... high value organic chemical byproducts instead of venting useless oxygen... 30–40% reduced hydrogen production costs...  pilot projects expected within 2–3 years, with the potential for full commercial deployment by the end of the decade. This could transition hydrogen from a niche industrial gas to a common fuel found at local filling stations and used in residential energy systems"