It makes a lot of sense of course to tackle the latent hydrogen fuel revolution for the angle of just-in-time production because transporting and storing hydrogen is hard. Really hard. Engineuity has suggested a method for producing a continuous flow of hydrogen and steam under full pressure inside a car. The system could then be used to power fuel cells with hydrogen, or a steam engine.
Engineuity's technology replaces the traditional gas tank in a car with a device called a Metal-Steam combustor that separates hydrogen out of heated water using a super heated metal coil. There is a solid waste product of the process in the form of a metal oxide which is envisaged to be collected at a fuel station for recycling.