Facile synthesis of amorphous Co engineered FePO₄: As an efficient electrocatalyst for hydrogen and oxygen evolution reactions

Water-based hydrogen production has established itself as a competitive and feasible substitute for fossil fuels. Thus, the creation of effective electrocatalysts for the enduring generation of hydrogen has been the subject of extensive research. In this work, we synthesize Co engineered FePO₄ (Co–FePO₄) using a sophisticated hydrothermal synthesis technique. The fabricated materials are then employed for various analytical techniques. Then tested for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) using several electrochemical tests like electrochemical impedance spectroscopy (EIS), linear sweep voltammetry (LSV), and cyclic voltammetry (CV). The Co–FePO₄/GC attained overpotentials of 320 mV (OER) and 174 mV (HER). Its improved catalytic efficiency is further demonstrated by its reduced Tafel slopes for OER (64 mV dec⁻¹) and HER (93 mV dec⁻¹) for HER, which is compared to the state-of-the-art catalysts. The stability of the synthesized Co–FePO₄ is further confirmed by chronoamperometry, and remains stable up to 40 h for HER, and 32 h for OER. Hence, Co–FePO₄ is a promising contender for cutting-edge electrochemical energy applications because of these unique and remarkable properties.