The central challenge in using these catalysts is that NiFe oxyhydroxide species are not directly available and require generation through vast amounts of energy or time. The state-of-the-art production of NiFe oxyhydroxides requires the electrochemical conversion treatment under significant bias beyond 1.4 V vs. RHE for at least 24 hours or through multiple-step hydrothermal conversion with temperature above ∼70 • C for at least six hours . These approaches are impractical for PEC anodes whose operating bias must be lower than 1.23 V vs. RHE. The present work provides a light-induced avenue for the fast and low-power generation of highly performing NiFe oxyhydroxides-alloy that significantly boosts efficiency performances while helping address the device stability problem of the Silicon industry.