Abstract
Metal-modified boron-doped diamond has been prepared for preliminary study of CO2 electroreduction. Pt was electrodeposited at boron-doped diamond (BDD) by using chronoamperometry technique. The precursor metal solution concentration of 6 mM was applied with deposition potentials of -0.3 V (vs Ag/AgCl). Characterization by using FESEM and XPS confirmed the presence of Pt on the surface of BDD. Cyclic voltammetry was applied to obtain an optimum condition for electroreduction of CO2. CO2 dissolved in 0.1 M NaCl and 0.1 M Na2SO4 solutions were applied. A reduction peak, attributable to CO2, appeared at a potential of -0.7 V (vs Ag/AgCl) in NaCl solution, while no peak was observed in Na2SO4 solution. The result indicated that the metal-modified electrodes has successfully prepared as a working electrode for CO2 electroreduction.
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