Detection of Nitrate/Nitrite Using BDD Electrodes Coated with Metal Nano-Catalysts†
AbstractThe aim of this work is to investigate the mechanisms of nitrate and nitrite ions electro-reduction in neutral solution at boron doped diamond (BDD) electrodes modified with metal catalyst nanoparticles. The electrode preparation consists in sputtering a thin metal layer onto polycrystalline BDD by a physical vapor deposition method, followed by a dewetting heat treatment at 700 °C under oxygen-free atmosphere. Such a process leads to a stable population of nanosized metal particles as characterized by scanning electron microscopy (SEM) and cyclic voltammetry. Electro-reduction of NO2− and NO3− was characterized both on a bare BDD electrode and on BDD electrodes decorated with platinum-gold, ruthenium-gold and ruthenium nanoparticles in the range 4 to 25 mM. The amperometric response was enhanced by the presence of the nanoparticles, the most sensitive electrode being Pt-Au/BDD and Ru-Au/BDD for nitrite and nitrate ions, respectively.
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Zribi, B.; Scorsone, E. Detection of Nitrate/Nitrite Using BDD Electrodes Coated with Metal Nano-Catalysts. Proceedings 2017, 1, 452.
Zribi B, Scorsone E. Detection of Nitrate/Nitrite Using BDD Electrodes Coated with Metal Nano-Catalysts. Proceedings. 2017; 1(4):452.Chicago/Turabian Style
Zribi, B.; Scorsone, E. 2017. "Detection of Nitrate/Nitrite Using BDD Electrodes Coated with Metal Nano-Catalysts." Proceedings 1, no. 4: 452.
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