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A cheap, emissions-free device that uses a 1.5-volt AAA battery to split water into hydrogen and oxygen by electrolysis has been developed by scientists at Stanford University ( http://news.stanford.edu/news/2014/august/splitter-clean-fuel-082014.html ).
Unlike other water splitters that use precious-metal catalysts, the electrodes in the Stanford device are made of inexpensive, abundant nickel and iron.
“This is the first time anyone has used non-precious metal catalysts to split water at a voltage that low,” said Hongjie Dai, a professor of chemistry at Stanford. “It’s quite remarkable, because normally you need expensive metals, like platinum or iridium, to achieve that voltage.”
http://www.kurzweilai.net/a-low-cost-water-splitter-that-runs-on-an-ordinary-aaa-battery
http://www.nature.com/ncomms/2014/140822/ncomms5695/full/ncomms5695.html
(Score: 2) by Tork on Sunday August 24 2014, @09:44AM
🏳️🌈 Proud Ally 🏳️🌈
(Score: 0) by Anonymous Coward on Sunday August 24 2014, @02:02PM
One can use graphite electrodes (pencils). Voltage will be higher (notice that thermodynamics allows to go as low as ~1,1V so 1,5V is enough) but people were doin it since XIX century.
Here they just got record low voltage for iron-nickel electrodes.