One Pot Synthesis of Lanthanum Doped Cobalt Selenate Electrocatalyst for Oxygen Evolution Reaction (OER)

Abstract

There is a continuous demand and burning of limited fossil fuel prompted the urgent need to develop renewable, abundant, and clean energy sources. Therefore, for solving the energy crisis, the production of green hydrogen by electrochemical water splitting plays a vital role in achieving this goal. But, this electrochemical energy production process is kinetically sluggish due to multielectron transfer reactions. Therefore, the development of an efficient inexpensive catalyst towards OER has been required to accelerate the rate of oxygen evolution. We effectively designed and synthesized sheet-like morphology of lanthanum-doped cobalt selenate through the one-pot hydrothermal route. The synthesized material is confirmed by different techniques. Herein prepared sheet-like La doped CoSe2O5 material is employed as an efficient electrocatalyst towards OER in alkaline medium. This electrocatalyst shows the low overpotential and the low Tafel slope value. Also successfully doped with the rare earth metal it shows the large exchange current density and the active sites.