Nanoflake NiMn Layered Double Hydroxide Coated on Porous Membrane-like Ni-Foam for Sustainable and Efficient Electrocatalytic Oxygen Evolution

Layered double hydroxides (LDHs) have gained vast importance as an electrocatalyst for water electrolysis to produce carbon-neutral and clean hydrogen energy. In this work, we demonstrated the fabrication of nano-flake-like NiMn LDH thin film electrodes onto porous membrane-like Ni-foam by using a simple cost-effective electrodeposition method oxygen evolution reaction (OER). Various Ni1-xMnx (where x = 0.15, 0.25, 0.35, 0.50 0.75) are utilized achieve optimal catalyst efficient sustainable OER process. The various composition-dependent surface morphologies porous-membrane-like structure provided high electrochemical area along with abundant active sites facilitating OER. optimized referred Ni0.65Mn0.35 showed excellent properties ultralow overpotential 253 mV at current density 50 mAcm−2, which outperforms other state-of-the art catalysts reported in literature. relatively low Tafel slope 130 dec−1 indicates faster more favorable kinetics Moreover, exhibits durability over continuous operation 20 h, indicating great sustainability alkaline medium. This study provides knowledge optimization electrode electrolysis.