Abstract
A facile, low cost and one pot solvothermal method is reported for in-situ incorporation of pre-synthesized nanoparticles into Zr-based MOF, UiO-66, to form highly efficient catalysts for hydrogen evolution reaction. The formation of synthesized samples is confirmed by Powder X-Ray Diffraction, Fourier Transform Infrared Spectroscopy, Raman Spectroscopy, Scanning Electron Microscopy, Energy Dispersive X-Ray and UV–Vis Spectroscopy. Hydrogen evolution reaction is studied by cyclic voltammetry and linear sweep voltammetry. It is observed that incorporation of nanoparticles within MOF UiO-66 increases the efficient absorption of visible light, decreased the electro-hole pair recombination and increased the charge separation. CuO@UiO-66 shows lowest onset potential, lowest overpotential and highest current density as compared to bare UiO-66 and Co3O4@UiO-66. CuO@UiO-66 is a cost effective, highly efficient HER catalyst and required very low overpotential of 220 mV to achieve the benchmark of 10 mAcm−2 in alkaline medium.
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