It’s probably not new, as in never been done. However, what makes it possibly interesting is that it can be done at such a relatively cheap price, compared to earlier methods.
I see. So the next question is... can be done cheaply enough where one could do it on a small level for home domestic use?
... or would the home production of hydrogen gas constitute a homeland security threat?
I can see now: “...We have to regulate water to make sure it doesn’t get into the hands of terrorists - especially domestic ones...”