SOLAR-DRIVEN ALKALINE WATER SPLITTING FOR GREEN HYDROGEN GENERATION: ROLE OF ELECTROLYTE COMPOSITION, ELECTRODE SELECTION, AND PHOTOVOLTAIC POWER MANAGEMENT
DOI:
https://doi.org/10.37547/Keywords:
green hydrogen, alkaline electrolysis, potassium hydroxide, Ni-Mo electrode, NiFe oxide, overpotential, MPPT, photovoltaic integration, Uzbekistan.Abstract
Three student research projects conducted at Andijan State Technical Institute are unified in this paper to deliver a system-level perspective on solar-powered alkaline hydrogen generation. The first project (Ibrohimov O.B.) screened five alkaline solutions — KOH at two concentrations, NaOH at two concentrations, and K₂CO₃ — with respect to ionic conductivity and long-term electrochemical stability. The second project (Yunusov Kh.F.) characterised five electrode configurations, ranging from conventional 316L stainless steel to a bespoke Ni-Mo cathode / NiFe-oxide anode pairing. The third project (Keldiboyev I.I.) quantified how maximum-power-point-tracking (MPPT) control shapes the annual hydrogen output of a grid-independent photovoltaic (PV) electrolyzer. Taken together, the data establish that a 5 kW PV installation operating under Andijan irradiance conditions, filled with 30 wt% KOH, and fitted with Ni-Mo | NiFe composite electrodes plus MPPT control, can deliver 160–180 kg of emission-free hydrogen annually.
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