MEMBRANE-COVERED, ROTATED DISK ELECTRODE

A rotated disc electrode that can be used to evaluate mass transport in membranes is described. In this design, both a disc electrode and reference electrode are mounted in a rotating shaft over which the membrane is placed. A transport model is given for solutes that diffuse through the membrane and undergo simple reaction at the electrode surface. With membrane in place, the diffusion current at low rotation rates approaches the theoretical (Levich) current that would be seen without membrane. At high rotation rates, however, the current is dependent on membrane permeability. © 1979, American Chemical Society. All rights reserved.