Cobalt nanoflowers: Synthesis, characterization and derivatization to cobalt hexacyanoferrate—Electrocatalytic oxidation and determination of sulfite and nitrite

Autor:	Hossein Heli, I. Eskandari, Naghmeh Sattarahmady, Ali Akbar Moosavi-Movahedi
Rok vydání:	2012
Předmět:	General Chemical Engineering Inorganic chemistry chemistry.chemical_element Electrocatalyst Redox Amperometry chemistry.chemical_compound Electron transfer chemistry Sulfite Electrode Electrochemistry Nitrite Cobalt
Zdroj:	Electrochimica Acta. 77:294-301
ISSN:	0013-4686
Popis:	Cobalt hexacyanoferrate (CoHCF) nanostructure was synthesized by anodic oxidation of metallic cobalt nanoflowers in a solution of K 3 Fe(CN) 6 . The synthesized CoHCF sample was then employed to prepare a modified carbon paste electrode. The modified electrode was characterized electrochemically in a phosphate buffer solution at physiological pH. Two redox transitions were appeared in the voltammograms which were related to the redox processes of Co II /Co III and Fe II /Fe III in the solid state of CoHCF. The modified electrode was successfully applied to the electrooxidation of nitrite and sulfite and these substrates were oxidized electrocatalytically on the modified electrode surface via the active Fe III species. The catalytic rate constants, the electron transfer coefficients and diffusion coefficients involved in the electrocatalytic oxidation of the compounds were reported. The modified electrode was applied to the amperometric determination of nitrite and sulfite.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::71cff74d5bf3d3e491ae98704cecd9c2 https://doi.org/10.1016/j.electacta.2012.06.014 Zobrazit plný text záznamu Full Text from ScienceDirect