Data for Characterisation of platinum electrodeposits on a titanium micromesh stack in a rectangular channel flow cell

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Arenas Martinez, L. F. et al (2017). Characterisation of platinum electrodeposits on a titanium micromesh stack in a rectangular channel flow cell. Electrochimica Acta.Abstract
Platinised titanium mesh is a common electrode material in industrial electrolytic cells and Ce- based redox flow batteries. In this work, the electrodeposition of platinum on a stack of titanium micromeshes is carried out from a flowing alkaline solution in a rectangular channel, divided flow cell. The morphology and distribution of platinum deposits are studied by SEM, EDS mapping and X-ray computer tomography. The active surface area of the electrode was assessed from the charge transfer current for the reduction of Ce(IV) and compared to that of planar and expanded metal mesh electrodes. The surface area was estimated by hydrogen electrosorption relative to that at a planar Pt/Ti electrode. As expected from the potential drop within the electrode channel, the individual micromesh near the cell separator displayed a higher platinum content. Pt/Ti micromesh offers an extended surface area and enhanced mass transport compared to planar electrodes and conventional expanded metal mesh anodes. The applications for these and alternative electrode structures are discussed.