Hi,

Transition metal based photocatalysts decorated with electrocatalysts/ photosenstizers are proven to be efficient for solar to hydrogen production.

You can go through these articles:

https://link.springer.com/article/10.1007/s40820-018-0229-x

https://onlinelibrary.wiley.com/doi/abs/10.1002/elan.201600270

https://www.sciencedirect.com/science/article/pii/S0360319918334633

https://www.sciencedirect.com/science/article/pii/S1364032114009265

Needless to say , it is water if scientists come up with an efficient cost-effective closed-cycle process. In such process, water will be a reactant in one step (or more than one step) & hydrogen will be a product in one step (or more than one step).

British scientists have finally been able to harness the principles of photosynthesis to develop a new way of producing hydrogen in a scientific achievement that provides a possible solution to global energy problems

https://en.wikipedia.org/wiki/Hydrogen_production

Hydrogen produced from three ways 1.from water gas shift reaction 2.from water (using electrolysis,thermolysis method)3.from methane

CH4 + H2O → CO + 3 H2

Morning dear Ramajanickam,

The first is that is very relative to said that a material be "The best";

On the other hand, I recommend you next articles:

https://www.sciencedirect.com/science/article/pii/B9780128135457000118

https://www.sciencedirect.com/science/article/pii/S0360319918339429

Article Review of sustainable solar hydrogen production using photon...

With kind regards,

Greetings,

Julián :)

Thank you all, for your valuable comments and suggestions.

https://www.scientificamerican.com/arabic/articles/news/cheap-technology-to-extract-hydrogen-fuel/