| Popis: |
A study of the anodic oxidation of urea on a Pt-black electrode in K rebs -R inger bicarbonate buffer in the presence of glucose was performed. Changes in urea and glucose concentration, pH and anode half-cell potential were measured. At a current density of 0.5 mA cm −2 and an electrode area of 50 cm 2 , 4×10 −4 mole urea was oxidized in a 15 h run. NH 4 + , NO − 3 , and NO − 2 were not found as products of the oxidation. Calculations of coulombic utilization during the oxidation process were compatible with a 6-electron process. N 2 , CO 2 , and H 2 O were the most likely products. The feasibility of developing an electrochemical de-ureator, utilizing electrocatalysts, electricity and air or O 2 for urea removal by a portable artificial kidney was explored. |
