Nanoparticles based on copper deposited on carbon spheres. Preparation, characterization and application for CO2 photo-electrochemical reduction
作者： S. Benammar , A. Boudjemaa , G. Nezzal , S. Gómez-Ruiz , D. Meziane
DOI: 10.1016/J.JELECHEM.2017.12.007
关键词: Chemical vapor deposition 、 Visible spectrum 、 Absorption spectroscopy 、 Electrochemistry 、 Chemistry 、 Analytical chemistry 、 Copper 、 Fourier transform infrared spectroscopy 、 Raman spectroscopy 、 Carbon
摘要: Abstract In this study, we have examined the performance of copper nanoparticles deposited on carbon spheres with a mass weigh 10 wt% (labeled 10Cu-CSs) via photo-electrochemical reduction dioxide (CO 2 ). The (CSs) were prepared by chemical vapor deposition method and 10Cu-CSs was made homogeneous precipitation method. materials characterized different physico-chemical techniques such as X-ray diffraction (XRD), Raman, Fourier transform infrared (FTIR) diffuse reflectance (DR) spectroscopy, electrical conductivity studies. material studied for CO under visible light illumination. synthesized exhibited single phase monoclinic structure CuO CSs confirmed XRD, Raman FTIR spectroscopies results. semi-conductor property established conductivity, activation energy obtained ca. 0.04 eV. UV–visible absorption spectrum showed direct band gap transition 1.22 eV. cathode p -type conductivity. enhanced photo-conversion to formic acid reaction conditions. particular, demonstrated gave acid, which at higher potential than standard redox potentials copper. Furthermore, characterization that onto used electrode effectively generated photo-induced electron/hole pairs irradiation leading an enhancement photo-reduction in NaHCO 3 electrolyte.
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