Hydrogen

Ammonia never took off in the past because ammonia only combusts at super high temperatures, making its hydrogen inaccessible in the normal world. Plus, chemical reactions created a byproduct of nitrogen oxides, an air pollutant that can lead to lung infections. So it didn’t make sense to use ammonia as fuel for hydrogen-powered vehicles — it would take so much more energy to get the hydrogen out that it wouldn’t be worth powering your car (though fossil fuels also emit nitrogen oxides when they burn).

Combines Electricity Storage And Hydrogen Production In A Single System, The battolyser is based on the 'nickel-iron battery', a type promoted in the twentieth century particularly by Thomas Edison. Mulder commented, 'It's a very robust battery. Original examples are still working. Also, the raw materials are cheap and obtainable anywhere.' While the battery is charging, the electrodes produce two materials (NiOOH and reduced Fe), which are familiar in the world of electrolysis as a catalyst for the chemical reaction that produces hydrogen and oxygen. Thus, the electrodes, in their charged state, enable water to be electrolysed.