期刊
RUSSIAN JOURNAL OF ELECTROCHEMISTRY
卷 50, 期 4, 页码 370-378出版社
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S1023193513050133
关键词
Pt(100); nitric oxide NO; ammonia
资金
- Russian Foundation for Basic Research [10-03-00427]
- MICINN [CTR2010-1624]
- Generalitat Valenciana [Prometeo/2009/045]
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 similar to 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 a dagger NH3 redox transformations at 0.5-0.8 V.
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