Incorporation of MnO2 nanoparticles into MOF-5 for efficient oxygen evolution reaction

A composite MnO2@MOF-5 is prepared by in situ incorporation of pre-synthesized MnO2 nanoparticles into metal organic framework, MOF-5, during synthesis. The product characterized powder X-ray diffraction analysis, Raman spectroscopy, Fourier transform infrared ultraviolet-visible scanning electron microscopy, energy-dispersive and elemental mapping, which support the formation proposed materials. oxygen evolution reaction activity evaluated cyclic voltammetry, linear sweep chronoamperometric measurement under visible light. It found that MnO2@MOF-5/NF has better durability ability to produce a current density 10 mAcm−2 at only 324 mV overpotential with lower 71 mVdec−1 Tafel slope as compared some previously reported Mn-based catalysts for (OER). stability these electrodes studies 6000 s presence light, they showed constant density. Furthermore, studied continuous CV sweeps 1.0 M NaOH scan rate 100 mVs−1 shows materials are stable up cycles, confirms electrodes.