In this study, the charge/discharge cycling behaviour of the Ce3+/Ce4+ redox couple in methanesulfonic acid medium on various Pt and Pt-Ir coated titania based substrates was investigated as a function of solution flow rate, temperature and charge/discharge current density using a rotating disk electrode. Although superior performances (in terms of the voltage efficiency, qv) were obtained from the electrodes containing higher amounts of platinum, a deterioration of these electrodes with cycling was evident (after 150 cycles). At rotation rates between 600 rpm and 1200 rpm, high qv (> 90%) could be obtained as long as the current density j applied was below the mass transport limiting current density, jL. For j ' s above this value, the oxygen evolution reaction occurred with Ce3+ oxidation whereas the Ce4+ reduction was accompanied by oxygen reduction, resulting in lowered qv ' s. Better stability towards cycling and higher qv's were observed at 60 C compared to 25 C, especially for the etched Pt electrodes. The optimum loading for the Pt substrates was 3 g m(-2) while for the case of the heat treated samples 10 g m(-2) of Pt. (C) 2014 Elsevier Ltd. All rights reserved.