Poly-N-Methylpyrrole as an Oxygen Electrode
Original Publication Date: 1981-Apr-01
Included in the Prior Art Database: 2005-Feb-11
We propose the use of thin poly-N-methylpyrrole films as an oxygen electrode. These film electrodes are inexpensive, provide a large area, and will promote the irreversible reduction of O(2) in aqueous solutions. From cyclic voltammetric analysis, the peak for the reduction of O(2) dissolved in 0.25 N NaOH appears at -300 mV vs. SSCE on a poly-N-methyl-pyrolle surface and at -500 mV on carbon, although this latter peak is very wide. On platinum no peak is visible until a potential of -1000 mV is reached and H(2)O is electrolyzed. The currents observed on the film and on carbon are dependent on the diffusion of O(2) to the electrode surface. The film is stable to these reaction conditions and was used for several experiments.