[NorthMountain]

Fuel cell vehicles use hydrogen gas to power an electric motor

Where does hydrogen gas come from?

[Ozark Tom]

Hydrogen most commonly is produced by steam reformation of hydrocarbons, usually natural gas.

As to using NG in an internal combustion engine or a solid oxide fuel cell, the electric route should net double the mileage. The drawback is that the gas and air supplied usually must be exceedingly free of contaminants that could poison the fuel cell ceramic electrolyte.