Detection of Nitrate/Nitrite Using BDD Electrodes Coated with Metal Nano-Catalysts
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2017-08-11 |
| Authors | Bacem Zribi, Emmanuel Scorsone |
| Institutions | Commissariat Ć lāĆnergie Atomique et aux Ćnergies Alternatives, CEA LIST |
| Citations | 1 |
Abstract
Section titled āAbstractāThe 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 Ā°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 NO2ā and NO3ā 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.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
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