Nanostructured Composite Catalyst for Electrochemical Water Splitting: Significantly Improved for Hydrogen Evolution Reaction

The evolutionary and rational design we incorporated for an efficient nonprecious metal nanocom-posite electrocatalysts for the hydrogen production which is a scientific challenge in the field of renewable energy. Herein, we report a simple and very active, the functional electrocatalyst for water oxidation which is highly demanded. It is of great prime importance for hydrogen evolution reaction (HER) which significantly contributes to renewable technologies. The values for electrocatalysts are NiCo 2 O 4 and NiCo 2 O 3 /P Tafel slope 66 and 42 mV/decade and overpotential of 382 and 320 mV and current density achieved at 10 mA/cm 2 anin 1.0 M KOH. The composites are characterized by SEM, HR-TEM, X-ray diffraction, XPS, and SAED. The NiCo 2 O 3 /P having high durability measured for 50 hours and its EIS results holding a small charge transfer resistance 28.81 Ohms (Ω) and capacitance containing 0.81 mF. Finally, we give an outlook for the development of these nanoma-terials in the short- and mid-term, highlighting the critical challenges to confront for a lab-to-real life transition of these highly promising nanocomposites.