Abstract
A highly polished planar Pt electrode was used in an in situ reflection−absorption infrared cell to examine the chemical products of electrochemical reactions of NaNO2 in a methanolic solution in the 2500−1100 cm−1 range. Analysis of the resulting infrared bands showed that methanol reacts directly with the electro-oxidation products of nitrite. The predominant oxidation product was methyl nitrite, with apparent smaller quantities of NO2, NO3−, and NO. The reduction product of in situ-generated methyl nitrite was N2O, presumed to occur via adsorbed N- and O-type species. No other species arising from NxOyHz were observed; however, bands associated with the stretching modes of O−H and N−H that would clearly identify any such products were outside the accessible spectral range examined here due to interfering absorptions from methanol.
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