RT info:eu-repo/semantics/article
T1 A FTIR characterization of surface interactions of cyanide and coppercyanide with a platinum electrode in alkaline solution
A1 Souto, Ricardo Manuel
A1 Ricci, F.
A1 Szpyrkowicz, L.
A1 Rodríguez Marrero, José Luis
A1 Pastor Tejera, Elena María
AB In this paper, the nature of the species formed in the electrochemical interactions between a polycrystalline platinum surface and cyanide and copper-cyanide species in alkaline solution (pH 13) has been investigated by combining cyclic voltammetry with in situ FTIR spectroscopy. This study was performed because electrochemical reactors for the treatment of cyanide-containing industrial wastewaters have been shown to achieve viable destruction rates when copper ions are present in the alkaline solution through the formation of copper oxide films [1-3]. It has been found that the complexation of cyanide ions by copper species hinders the adsorption of the anion at the electrode, thus avoiding the characteristic electrode poisoning by CO that occurs in the absence of soluble copper species. Conversely, soluble copper-cyanide complexes can be electrooxidized at the platinum surface through the formation of cyanate species as intermediate, and of HCOOH and NO as end products. The addition of copper species to the electrolyte also facilitates this route for cyanide oxidation to occur at higher rates without poisoning the platinum electrode
YR 2011
FD 2011
LK http://riull.ull.es/xmlui/handle/915/19131
UL http://riull.ull.es/xmlui/handle/915/19131
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 18-nov-2024