It looks like it would be better utilized in an electrical plant
rather than "a car or heavy machinery" as they brought up in the
story. Producing radio waves to get the hydrogen out of salt water
HAS to be cheaper than splitting out the hydrogen and oxygen
electrically. the Na and Cl should still be NaCl at least. cut a deal
with mortons? hehe. As to what to do with the Hydroxyl well every electrical plant has their own special nasty by product, but if the radio waves keep cutting loose the hydrogen, it might end up a pile of salt alone. Need to look into it more. either way it's pretty nifty.
Ahh wait the supervillan would come up with a plan to direct massive
blasts of this frequency at the earth's oceans setting the whole world
ablaze. Sorry, had myself a lex luthor moment. Holding the world hostage for cash, which is used to pay off the bills for the machine
you built to threaten them all with.