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

E. B. Molodkina, I. G. Botryakova, A. I. Danilov (Corresponding author), J. Souza-Garcia, M. C. Figueiredo, J. M. Feliu

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5 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)370-378
Number of pages9
JournalRussian Journal of Electrochemistry
Volume50
Issue number4
DOIs
Publication statusPublished - 1 Jan 2014
Externally publishedYes

Keywords

  • ammonia
  • nitric oxide NO
  • Pt(100)

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  • Cite this

    Molodkina, E. B., Botryakova, I. G., Danilov, A. I., Souza-Garcia, J., Figueiredo, M. C., & Feliu, J. M. (2014). Redox transformations of adsorbed NO molecules on a Pt(100) electrode. Russian Journal of Electrochemistry, 50(4), 370-378. https://doi.org/10.1134/S1023193513050133