Electrochemical/Photoelectrochemical Water Splitting on Self-Limiting Electrodeposited Iron-Group Mutual Alloys

Scalable energy conversion/storage by water splitting is significantly hindered the slow kinetics of oxygen evolution reaction (OER). Implementation electrochemical catalysts with low cost and high turn-over efficiency, or application a photoanode in photoelectrochemical (PEC) cell using semiconductor proper protection layer are two possible solutions. Herein, binary Iron-group alloy films (Ni-Co Ni-Fe) one ternary film (Ni-Co-Fe) under self-limiting deposition condition investigated continuous ultrathin various composition generated. The deposition, corroborated XPS depth profile, caused precipitation hydroxide/oxyhydroxide species local pH, enabled privation pH buffer species. Each mutual exhibits improved oxidation compared to pure i Co film. In particular, an overpotential 0.314 V at 10 mA cm −2 Tafel slope 34.7 mV dec −1 obtained on Ni-Fe-Co deposited GaAs further for oxidation. stability towards photocorrosion light aqueous solution containing K 3 Fe(CN) 6 /K 4 electrodepositing while optimum property found