Electrocatalysis of anodic oxygen-transfer reactions: Oxidation of ammonia at anodized Ag-Pb eutectic alloy electrodes
- Ames Lab., IA (United States)
Ammonia (NH{sub 3}) in alkaline media is oxidized to NO{sub 3}{sup {minus}} at anodized Ag-Pb eutectic alloy electrodes (2.4% Ag by weight). The anodic signal is diminished for pH ca. 10, the anodic signal decreases with time because of the loss of NH{sub 3} by volatilization. The heterogeneous rate constant for oxidation of NH{sub 3} to NO{sub 3}{sup {minus}} is significantly smaller than that for oxidation of ethylamine (EA) to acetaldehyde and NH{sub 3} (k{sub app,NH{sub 3}}/k{sub app,EA}={approximately}0.2). Hence, NH{sub 3} is concluded to be a product of ethylamine oxidation at a rotated disk electrode whereas acetaldehyde and NO{sub 3}{sup {minus}} are the final products of the exhaustive electrolysis of ethylamine.
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 131775
- Journal Information:
- Journal of the Electrochemical Society, Vol. 142, Issue 10; Other Information: PBD: Oct 1995
- Country of Publication:
- United States
- Language:
- English
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