Redox transformations of adsorbed NO molecules on a Pt(100) electrode

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Title: Redox transformations of adsorbed NO molecules on a Pt(100) electrode
Authors: Molodkina, E.B. | Botryakova, I.G. | Danilov, A.I. | Souza-Garcia, Janaina | Figueiredo, Marta C. | Feliu, Juan M.
Research Group/s: Electroquímica de Superficies
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Keywords: Pt(100) | Nitric oxide NO | Ammonia
Knowledge Area: Química Física
Issue Date: Apr-2014
Publisher: Pleiades Publishing
Citation: Russian Journal of Electrochemistry. 2014, 50(4): 370-378. doi:10.1134/S1023193513050133
Abstract: The electrochemical behavior of adsorbed NO molecules on a Pt(100) electrode has been studied in perchloric acid solutions by means of cyclic voltammetry. According to the literature data, a saturated NO adlayer with a coverage of ∼0.5 monolayers (MLs) is formed under open circuit conditions in an acidic nitrite solution as a result of a disproportionation reaction. The saturated adlayer is stable in the potential range of 0.4–0.9 V vs. a reversible hydrogen electrode in 0.1 M HClO4. NO molecules are oxidized at 0.9–1.1 V with the formation of adsorbed nitrite anions, and they can be reduced to ammonia at potentials less than 0.4 V. In this paper it has been shown that the adlayer stability depends on the surface coverage and extent of ordering. An unsaturated NO adlayer demonstrates NO ↔ NH3 redox transformations at 0.5–0.8 V.
Sponsor: Financial support from the Russian Foundation for Basic Research (project no. 10-03-00427), MICINN (CTR2010-1624)(Feder), and Generalitat Valenciana (Prometeo/2009/045)(Feder, Spain) is gratefully acknowledged.
URI: http://hdl.handle.net/10045/45288
ISSN: 1023-1935 (Print) | 1608-3342 (Online)
DOI: 10.1134/S1023193513050133
Language: eng
Type: info:eu-repo/semantics/article
Rights: © Pleiades Publishing, Ltd. 2014
Peer Review: si
Publisher version: http://dx.doi.org/10.1134/S1023193513050133
Appears in Collections:INV - EQSUP - Artículos de Revistas

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