ABSTRACT
Hydrogen is a pure form of energy, and it has almost zero greenhouse emissions as a fuel. The production mechanisms of hydrogen are solar methane cracking (SMC), thermochemical cycles (TC), water electrolysis (WE), and steam methane reforming (SMR), which are the most vigorously measured routes for solar hydrogen production. However, most of the hydrogen production still originates from methods such as SMR that involve the use of fossil fuels. Hydrogen production through solar thermal energy will be a clean alternative that is sustainable, economical, and eco-friendly. Hydrogen production by renewable sources such as solar energy will be focused on in this book chapter, and its associated challenges and future perspectives will also be discussed in detail in coupling with affecting parameters. The scenario of Indian research on this future fuel is also discussed with limitations.
