The universe's most prevalent element is hydrogen. However, it is present in enormous amounts as a component of the water in oceans, ice caps, rivers, lakes, and the atmosphere. Hydrogen is a clean fuel. It is the most prevalent chemical element and is thought to make about 75% of the universe's mass which can also be replaced with methane. Besides water, plants, animals and humans all do carry numerous hydrogen atoms. Although it is found in almost all living organisms' molecules, it is extremely rare as a gas and only makes up less than one part per million by volume.
Hydrogen is expensive to produce and is not readily available it is less common in the environment than other gases. For its manufacturing, procedures like water electrolysis are necessary. This technique takes a long time and is highly expensive. Furthermore, compared to fossil fuel-based hydrogen, which costs roughly USD 1.80 per kg, hydrogen produced from renewable energy ranges in price from USD 3 to USD 6.55 per kilogram.
The process of hydrogen generation is from a wide range of household sources, including biomass, fossil fuels, and water. Some of the processes include:
There are several hydrogen generation techniques being developed nowadays: