Kinetics and mechanism of nitrate and nitrite electroreduction on Pt(100) electrodes modified by copper adatoms

Empreu sempre aquest identificador per citar o enllaçar aquest ítem http://hdl.handle.net/10045/38749
Información del item - Informació de l'item - Item information
Títol: Kinetics and mechanism of nitrate and nitrite electroreduction on Pt(100) electrodes modified by copper adatoms
Autors: Molodkina, E.B. | Botryakova, I.G. | Danilov, A.I. | Souza-Garcia, Janaina | Feliu, Juan M.
Grups d'investigació o GITE: Electroquímica de Superficies
Centre, Departament o Servei: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Paraules clau: Pt(100) | Modified electrodes | Copper | Nitrate | Nitrite
Àrees de coneixement: Química Física
Data de publicació: de març-2013
Editor: Pleiades Publishing
Citació bibliogràfica: Russian Journal of Electrochemistry. 2013, 49(3): 285-293. doi:10.1134/S1023193513030105
Resum: Kinetics and mechanism of nitrate and nitrite reduction on Pt(100) electrode modified by Cu adatoms have been studied in solutions of sulfuric and perchloric acids by means of cyclic voltammetry and in situ IR-spectroscopy. It has been shown that the surface redox process with participation of ammonia or hydroxylamine at 0.5–0.9 V occurs only on the Cu-free platinum. The causes of this effect could be low adsorption energy of nitrate reduction products on copper or changes in the composition of the products (ammonia for Pt(100) and N2O for Pt(100)+Cu). Nitrate reduction on Pt(100)+Cu electrode is much faster in the perchloric acid solution (by several orders of magnitude) as compared with unmodified platinum as a result of induced adsorption of nitrate anions in the presence of partly charged Cu atoms. In the solutions of sulfuric acid the rate of nitrate reduction is considerably lower as copper adatoms facilitate adsorption of sulfate anions, which block the adsorption sites for the nitrate.
Patrocinadors: The work was financially supported by the Russian Foundation for Basic Research (project no. 10-03-00427). Financial support from MICINN (CTR2010-1624) (Feder) and Generalitat Valenciana (Prometeo/2009/045) (Feder) is gratefully acknowledged.
URI: http://hdl.handle.net/10045/38749
ISSN: 1023-1935 (Print) | 1608-3342 (Online)
DOI: 10.1134/S1023193513030105
Idioma: eng
Tipus: info:eu-repo/semantics/article
Drets: © Pleiades Publishing, Ltd. 2013
Revisió científica: si
Versió de l'editor: http://dx.doi.org/10.1134/S1023193513030105
Apareix a la col·lecció: INV - EQSUP - Artículos de Revistas

Arxius per aquest ítem:
Arxius per aquest ítem:
Arxiu Descripció Tamany Format  
Thumbnail2013_Molodkina_etal_RJE_final.pdfVersión final (acceso restringido)436,08 kBAdobe PDFObrir     Sol·licitar una còpia


Tots els documents dipositats a RUA estan protegits per drets d'autors. Alguns drets reservats.