Studies on Electrochemical Performance of Flower-Like La4Mo7O27 Nanostructures towards Oxygen Evolution Reaction

Abstract

Hydrogen production from water electrolysis demands modern and improved catalytic materials with increased electrocatalytic characteristics. A simple hydrothermal approach was used to prepare lanthanum molybdate (La _4 Mo _7 O _27 ) nanoflowers. The X-ray diffraction (XRD) and scanning electron microscope (SEM) techniques were used to characterise the physical structure and crystallinity of the prepared La _4 Mo _7 O _27 nanoflowers. The SEM images reveal La _4 Mo _7 O _27 was composed of nanoflowers. The prepared La _4 Mo _7 O _27 nanoflowers were used as electrocatalyst to catalyse oxygen evolution reaction (OER) where it requires the overpotentials of 400 mV to generate hydrogen at the current density of 20 mA cm ^−2 , which is less than that of commercially available bare nickel foam (450 mV).