A PHOTOPHYSICAL TECHNIQUE FOR THE MEASUREMENT OF LOCAL OXYGEN CONCENTRATION NEAR AN ELECTRODE SURFACE

Electrochemical processes involving gas production are of great technical importance but the mechanisms involved in the growth of electrogenerated bubbles and transport processes involving gas near an electrode still remain obscure. This paper describes an original technique, based on the inhibition of the fluorescence of an appropriate substance by dissolved oxygen, for the measurement of the local concentration of dissolved oxygen near an electrode. The possibilities offered by this technique and typical results are presented and discussed.