VOLTAMMETRY IN THE PRESENCE OF ULTRASOUND - A NOVEL SONO-ELECTRODE GEOMETRY

A new sono-electrode geometry is discussed in this paper, in which a s quare electrode of millimetre dimensions is placed perpendicular to a 20 KHz ultrasonic horn probe, its centre being some 30-40 mm distant f rom the surface of the tip of the ultrasonic horn. It is shown that th e mass transport of electroactive material to the electrode can be app roximately described by that of a convective Bow over a stationary pla te through comparison of the experimental results with theoretical dat a obtained via the analytical solution of the mass transport equations describing this model. This novel sono-electrode geometry is compared with other more popular geometries introduced in the recent sonoelect rochemical literature and the relative merits of these sonotrodes are discussed with respect to their mass transport characteristics. Copyri ght (C) 1996 Elsevier Science Ltd.