Electrochemical oxidation of hydroxylamine on gold in aqueous acidic electrolytes: An in situ SERS investigation

Denis R.M. Godoi, Youjiang Chen, Huanfeng Zhu, Daniel Alberto Scherson

研究成果: Article

14 引用 (Scopus)

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The electrooxidation of hydroxylamine (HAM) on roughened Au electrodes has been examined in aqueous buffered electrolytes (pH 3) using in situ surface-enhanced Raman scattering (SERS). Two distinct spectral features were observed at potentials, E, within the range in which HAM oxidation was found to ensue, centered at 803 cm-1 for 0.55 < E < 0.8 V and at 826 cm-1 for 1.0 < E < 1.40 V versus SCE, attributed, respectively, to adsorbed nitrite and adsorbed NO2. Similar experiments performed in solutions containing nitrite instead of HAM under otherwise identical conditions displayed only the peak ascribed to adsorbed nitrite over the range of 0.1 < E < 0.8 V versus SCE with no additional features at higher potentials. These observations strongly suggest that under the conditions selected for these studies the oxidation of HAM on Au proceeds at least in part through a pathway that does not involve nitrite as a solution-phase intermediate.

元の言語English
ページ(範囲)15711-15713
ページ数3
ジャーナルLangmuir
26
発行部数20
DOI
出版物ステータスPublished - 2010 10 19
外部発表Yes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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