Pt/Ebonex (R) electrodes prepared by electrodeposition from Pt 5Q solution at 368 K are demonstrated to be stable and resilient. It is shown that the voltammetry of Fe(CN)(6)(3-)/Fe(CN)(6)(4-) in 1 M KCl and 1 M NaOH, Ce(IV)/Ce(III) in 3 M CH3SO3H and Ag(I)/Ag(II) in 3 M HNO3 at Pt/Ebonex (R) electrodes are similar to that at bulk Pt. Pt/Ebonex-(R) electrodes with Pt loadings of 2 mg cm(-2) have been tested in a flow electrolysis cell for > 500 h without significant changes in properties.