It;s not likely to be a significant source of demand, and it's only a lab project right now, but an electrical system using microbes to generate electricity has its efficiency improved about twenty times by putting gold nanocoating on the anode. That efficiency gain is compared to using naked graphite anodes. Since gold is expensive, the inventors are loking for a cheaper alternative like iron.
Planned uses for the gizmo are water treatment and even desalination in the midst of generating power.
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