A high-performance electrode based on Ce-doped nickel-cobalt layered double hydroxide growth on carbon nanotubes for efficient oxygen evolution
Paper ID : 1307-ICNS
Authors:
Hosein Alami *1, mohammad dinari2
1isfahan university of technology
2Isfahan university of technology
Abstract:
High activity, stable, and affordable electrocatalysts for oxygen evolution reaction (OER) to replace precious catalysts, such as IrO2 and RuO2, be a way to renewable energy solutions, containing water-splitting and rechargeable metal-air batteries. Here, we report the impressive electrocatalytic activity for the OER of nanohybrid cerium-doped nickel-cobalt layered double hydroxide (Ce doped NiCo-LDH) grown on a scaffold of carbon nanotube (CNT) displayed excellent electrochemical performance in the water oxidation. The structure and morphology of the NiCoCe-LDH/CNT catalyst was analyzed by TEM, FESEM, EDS, XRD, FTIR, TGA, BET, and Raman techniques. The prepared electrode at the current density of 10 mA cm−2 showed overpotential (η) of 236 mV and the Tafel slope was 56 mV dec-1 in the 1M KOH. NiCoCe-LDH/CNT nanohybrid ‎exhibits more electrocatalytic activity and durability for oxygen evolution than commercial costly metal Ir and Ru catalysts.OER activity of the electrocatalysts was notably improved substantially due to the bolstered electron transport, lattice defects, special surface area and large range of the coordination number of Ce3+ in the nanostructure.
Keywords:
Layered double hydroxide (LDH); Carbon nanotube; Oxygen evolution reaction; Renewable energy
Status : Abstract Accepted (Poster Presentation)