Abstract
Hydrogen fuel production through water-splitting reactions offers a sustainable approach to store renewable energies. However, the efficiency of this process is impeded by the oxygen evolution reaction (OER), a complex four-electron oxidation half-reaction. In this study, we present a highly active and stable OER catalyst, lanthanide vanadate (LnVO4 - Ln = La to Lu), synthesized using a straightforward hydrothermal method. Comprehensive characterization of the electrocatalysts was performed employing scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) analysis. When applied to nickel (Ni) foam, lanthanide vanadate achieved a current density of 10 mA cm-2 at an overpotential of +280 mV in a 1.0 M KOH electrolyte. Furthermore, exceptional stability was demonstrated for over 5 hours of continuous operation. These findings highlight the potential of lanthanide vanadate-based materials as promising catalysts for efficient and stable overall water-splitting processes.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
