| 摘要 |
PURPOSE: To prevent nitrogen oxides from being adsorbed on the surface of an active carbon to prevent an electrode from being little deteriorated even if the electrode is used for a long period of time by a method wherein the electrode is formed into the active carbon performed a constant potential anode oxidation, which is an electrochemical oxidation treatment. CONSTITUTION: An active carbon fiber cloth is punched into a disc and that fiber cloth is dipped in a dilute sulfuric acid. This cloth is inserted in a holder 7 for a working pole 6 of a three-pole electrochemical cell 5 and the cell 5 is connected with a cyclic voltammetry testing device and a current is made to flow through the testing device. Voltages between the pole 6 and paired poles 8 are controlled so as to keep constant a potential difference between the pole 6 and a reference 9 and the amount of charge and discharge electricity (i.e., capacitance) of an electrode is increased by a constant potential anode oxidation. Moreover, the range of an electrochemical oxidation treatment is set in a range surrounded with a right-angled triangle, which takes 1 and 3 anode oxidation potentials on the axis of abscissas and takes a 4-hour anode oxidizing time on the axis of ordinates. |
