Highly enhanced electro-catalytic behavior of an amide functionalized Cu(II) coordination polymer on OER at large current densities

•We reported OER activity of electro-catalyst (LOCOM-1) using nickel foam (NF) in a 1 M KOH solution.•LOCOM-1 achieves current density of 10 mA cm−2 for OER with minimal overpotential 286 mV and impressive Tafel slope of 44.50 mVdec−1.•Chronoamperometric study exposed Cu-MOF showcasing remarkable durability for 40 h with value range of 1000 cycles in alkaline medium.•The uniform hetero-structure, outstanding integration of amide and copper, interfacial interaction, and porosity along with notable high 64.25 ECSA contribute to its exceptional performance.•LOCOM-1 holds potential for progressing sustainable hydrogen production vital for carbon-neutral energy technologies. Extensive utilization of fossil fuels has led to their swift exhaustion, causing an escalating energy dilemma and significant environmental apprehensions. This situation has spurred advancement of sustainable energy conversion systems. Electrochemical water splitting is viewed as a capable method for generating hydrogen and oxygen intended for diverse electrochemical energy apparatus. A proficient, multifunctional electro-catalyst capable of facilitating both OERs) and HERs is of paramount importance. In this work, we report Cu-MOF electro-catalyst synthesized via the solvothermal route engaging OER activity using nickel foam (NF) in a 1 M KOH solution. Several analytical techniques were used to investigate the electro-catalysts BET, PXRD, FTIR and oxidation states. The water-splitting evaluation of the LOCOM-1 demonstrated exceptional oxygen activity concerning OER (oxygen evolution reaction), showcasing to extent a current density of 10 mAcm−2 a reduced of 286 mV over potential. Additionally, it exhibited a diminished onset potential of 1.37 V attributable towards a decreased Tafel slope of 44.50 mVdec−1, and a proton couple electron transfer (PCET) channel that is stable over an extended period of time (1000 cycles of cyclic voltammetry and 40 h of chronoamperometry). Therefore, this current endeavour might offer a new prospect or pathway for exploring the OER (Oxygen Evolution Reaction). [Display omitted]