• In the present era, the cost-effective production of hydrogen (H2) is the vital research area, wherein clean water splitting driven by electricity or solar power is one of the most promising approaches.
• Further, using of clean Aqua water is costlier and resources are limited.
• In this instant, the clean water can be replaced by natural resource water like sea water with or without treatment for the process of production of H2.
• One of the major issues cause while using of real sea water during electrolysis process is that said water contains several salts, and that form participates on the cathode surface, which obstructs to reach the benchmark of current density.
• Thus, there is need for an electrolyzer system & framework to overcome above issues.

Electrocatalyst development:

• Anode Catalyst layer is designed by using a framework type structure i.e Cobalt hexacyanoferrate (Co-FePBA) mixed with nitrogen doped carbon nanotube (NCNT) and heated at different temperatures (300-400oC) to obtain Co-FePBA/NCNT composite.
• Cathode Catalyst layer is designed by Metallic nickel particles encapsulated inside nitrogen-doped carbon tubules (Ni/NCT).
• Carbon based substrate is used as catalyst support instead costly metallic foam.
• In present electrolyzer system, the KOH treated sea water is used as an electrolyte for testing purpose. Further, the ground water or salty ground water may be used as electrolyte as discussed in the Patent.
• Design Framework: The electrolyzer system comprises an anode catalyst layer, a cathode catalyst layer and a catalytic support for the anode catalyst layer and cathode catalyst layer.
• Problem Solution: Best anode-cathode assembly of the present invention shows overall water splitting voltage of 1.88V in 1M KOH treated seawater with a benchmark current density of 10mA/cm2 required for a 12.8% efficiency solar cell driven electrolyzer.