The experimental set-up designed by Randle et al was adopted. A modified LabOmak UF-spectro-electrochemical cell was used to conduct all the in-situ experiments. The cell resembling a 2-electrode set up has Pt mesh working and counter electrodes, and a pseudo reference electrode made of a Pt wire. A custom-made 2 mm path length quartz cuvette (Quartz Scientific Glassblowing Ltd., UK) was used to hold the electrodes and the electrolyte in place. To fabricate the working electrode with cubic phases, approx. 60 mg samples of cubic phase pastes were applied and spread evenly to cover the electrode surface over an area of approximately 15 × 10 mm. The modified electrode was soaked in the electrolyte for 20 min to allow equilibration before experiments.