Hi, A metal plate containing millions of square pits, each 45.589 nm on a side, that is exposed to Hydrogen gas, may emit electrons with a maximum energy of 40.8 eV minus the work function of the metal. These electrons may then be collected on an anode to drive an external current between the anode and the metal plate.
Alternatively, the plate just gets hot and can function as part of a boiler. Buy electric cars and recharge them from solar panels on your roof.
