Robust and durable hydrogen evolution using a CoCr2O4/g-CN composite electrocatalyst

초록

Improving the efficiency and affordability of reagents for hydrogen evolution reactions (HER) is essential for improving H2 fabrication. A low-cost hydrothermal process was utilized to fabricate CoCr2O4/g-CN composite to enhance HER efficiency. Several methods, including Scanning electron microscopy (SEM), X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET), were employed to investigate morphology, structural features and surface area. Furthermore, the electrocatalytic activity of CoCr2O4/g-CN composite was evaluated on nickel foam (NF) as the substrate. The material has shown favorable HER performance in basic media (1 M KOH), with a considerable enhancement in the active region, improved electrical conductivity and enhanced durability. Moreover, effective morphological features, a lower solution resistance (Rs = 1.47 Omega), and a larger surface area (SA) could lead to the observed enhanced performance. An electrocatalyst possesses a small overpotential (eta =-201 mV) and a lower Tafel slope (53 mV/dec) at current density (-10 mA/cm2) by following the Volmer-Heyrovsky process. A chronoamperometric study was also performed to assess the electrocatalyst materials' endurance over 80 h. According to these features, the catalysts will encourage and improve the reduction process. Thus, CoCr2O4/g-CN exhibits a significant increase in electrocatalytic activity, indicating that it is a feasible option for HER applications and future energy generation.

키워드