Electrocatalysis of anodic oxygen-transfer reactions: Aliphatic amines at mixed silver-lead oxide-film electrodes

Journal Article · Mon May 01 04:00:00 EDT 1995 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.2048607· OSTI ID:63193

Ge, J; Johnson, D C ^[1]

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1. Ames Lab., IA (United States)

Results are described from research directed to the discovery of new anode materials suitable for obtaining stable and sensitive response when applied at constant potential for the amperometric detection of organic amines. Voltammetric and amperometric results are compared for detection of selected organic amines in carbonate buffer (pH 10) at mixed silver-lead oxide films prepared by electrodeposition on platinum substrates and by anodization of Ag-Pb alloys. Anodic response is observed at both electrodes for ethylamine, N-ethylmethylamine, trimethylamine, ethanolamine, and L-alanine. However, data indicate that the oxide electrode formed by anodization of Ag-Pb alloys is superior with regard to stability of response. On the basis of flow-injection detection using constant applied potential in carbonate buffer, linear dynamic ranges (r{sup 2} > 0.99) are at least three decades for selected primary, secondary, tertiary, alkanolamine, and amino acids in carbonate buffer (pH 10), with detection limits (S/N = 3) of ca. 0.3 {mu}m (i.e., 6 pmol per 20 {mu}l injection). Results are presented for the characterization of these films using X-ray diffractometry, X-ray photoelectron spectroscopy, and scanning electron microscopy.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 63193
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 5 Vol. 142; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
AMINES
AMINO ACIDS
AMPEROMETRY
ANODES
CATALYSIS
LEAD ALLOYS
REDOX REACTIONS
RESPONSE FUNCTIONS
SILVER ALLOYS
VOLTAMETRY