Unveiling the role of a modulator in enhancing Co-BDC (benzene dicarboxylic acid) MOF performance as a superior electrocatalyst for energy conversion applications
摘要
The Co-BDC (Co-Benzene dicarboxylic acid) MOF in which CoB-B electrocatalyst, which has greater hydrogen evolution reaction (HER) activity, was synthesized under solvothermal conditions with a modulator present and compared the performance of hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Different modulators were used to create the morphological features of the produced catalysts, which greatly affects their appearance. Following validation of the XRD patterns of CoB-A and CoB-B versus the simulated patterns, FT-IR examination confirmed the presence of carboxyl and hydroxyl groups. Morphological changes after the modulator were added were shown by SEM analysis. The synthesized CoB-B demonstrates an overpotential of 477 mV for the OER and 310 mV for the HER at a current density of 10 mA/cm2 in a 1 M KOH alkaline medium, with anticipated Tafel slopes of 112 mV/dec and 74 mV/dec, respectively. The electrochemical studies reveal that CoB-B exhibits exceptional hydrogen evolution reaction performance, marked by low overpotential, high current density, and outstanding stability over 15 h. This research provides essential data on the structure–property–performance relationship of Co-BDC MOFs, which is vital for the development of sustainable energy systems.