MASS-TRANSPORT TO RETICULATED VITREOUS CARBON ROTATING CYLINDER ELECTRODES

Mass transport to rotating cylinder electrodes (radius 0.5 cm and heig ht 1,2 cm) fabricated from reticulated vitreous carbon (RVCRCE) was in vestigated using linear sweep voltammetry in a 0.5 M Na2SO4 + 1 mM CuS O4 electrolyte at pH2. At a fixed cupric ion concentration the limitin g current was found to be dependent upon velocity to the power 0.55 to 0.71 depending upon the porosity grade of the carbon foam. The produc t of mass transport coefficient and specific electrode area, k(m)A(e), was found to be approximately 0.51 s(-1) at 157 rad s(-1) (correspond ing to 1500 rpm) for the 100 ppi material. The experimental data are c ompared to the predicted performance of a hydrodynamically smooth rota ting disc electrode (RDE) and rotating cylinder electrode (RCE).