Publications

1975

1972

Johnson, J. W., H. W. Jiang, S. B. Hanna, and W. J. James. 1972. “Anodic Oxidation of Ethylenediaminetetraacetic Acid on Pt in Acid Sulfate Solutions”. Journal of The Electrochemical Society 119 (5): 574. https://doi.org/10.1149/1.2404264.
The anodic oxidation of EDTA was studied in acid sulfate solutions on platinized‐Pt at 25°C. Polarization relationships were obtained for the EDTA concentration range and pH range 0.35 to 3.80. Numerous reaction products were identified that indicated a sequential removal of acetate groups from the EDTA, each by an initial decarboxylation followed by a reverse Schiff‐type reaction, that produced formaldehyde and the corresponding amine. A reaction sequence which correlated the experimental data involved Frumkin‐type adsorption of the EDTA species through an unionized acetate group followed by a rate‐determining electrochemical decarboxylation.