HYDROGEN IS THE FUTURE...

Hydrogen fuel cells have great promise as a sustainable energy source, but hydrogen generation and storage issues continue to prevent their widespread acceptance. Many portable hydrogen fuel cell systems use hydrogen supply systems, such as high-pressure tanks, metal hydrides, and chemical hydrides, to store needed quantities of hydrogen. 

Sodium Silicide 

Sodium silicide (NaSi) and its hybrids are non-flammable,air-stable powders that instantly react with water (or water solutions) to produce pure hydrogen. Sodium silicide yields significantly more hydrogen per weight than pure sodium, but unlike sodium it is a non-pyrophoric, non-flammable material. 

It differs from other hydrogen-generation materials in that no hydrogen is actually stored in the sodium silicide. As a result, this hydrogen-generation process is safe, has fast reaction times, and an infinite shelf-life. Importantly, this generation process generates no greenhouse gases and leaves no environmentally-unfriendly waste. 

So, by using this technology we can actually emit hydrogen fuel and can utilise in modern vehicles. Such fuel cells are also can be used to run bikes and other transportation.The main point is that in this technology we split hydrogen and oxygen and therefore, we use the oxygen as a combustion gas for hydrogen and after liberation it becomes totally a water vapour.