Robin, your comment brings up an interesting possibility - at least for water-splitting... given the large amount of effort that has gone into efficient electrolysis over the past few decades
There is copious data to indicate that KOH electrolysis can exceed "unity" ... by a small amount, but "how" this controversial result could ever happen in practice, is far from clear. Is there an unexpected (non-thermal and perhaps photonic pathway such as EUV ) mechanism at work? Is there any chance that NMR resonance itself transfers a few eV of mass/energy locally from the K nucleus to the chemical bond of water, which then results in splitting off a proton ?? And after long use then results in a novel kind of nuclear reaction as a book-balancer... changing the nuclear dynamics from push to pull Robin wrote: If I understand this correctly, the reaction of K40 + e- => Ar40 should yield about 2.5 MeV. However I suspect that most of the energy would be carried away, never to be seen again, by the neutrino.