Study of lifetime of Platinum Modified Metal Oxides Electrodes

Abstract

Pt, IrO2, RuO2, Pt-IrO2 and Pt-RuO2 electrodes have been shown to be effective in their application in various fields. However, it is necessary to study their long-term stability. So, our objective is to prepare them and study their lifetime using intensiostatic measurement. Then they were prepared at 400 °C on titanium plates used as a substrate. Physical measurements (scanning electron microscopy) of these anodes revealed that their surface are rough and porous structures. Lifetime study was carried out in H2SO4 9 N and under a current density of 410 mA /cm2. The long-term stability of Pt improved when coupled to IrO2 in contrast to RuO2. From this study, the performance of the electrode was found to increase in the order: RuO2 < Pt-RuO2 < Pt < Pt-IrO2 < IrO2. For RuO2 and IrO2 pure electrodes, the deactivation would be due to the dissolution of precursors deposited on the titanium. For the Pt pure electrode, deactivation would be due to the detachment of platinum coating. The deactivation of the Pt-IrO2 and Pt-RuO2 electrode would be due, on the one hand to the platinum detachment from IrO2 or RuO2 and on the other hand to the metal oxides (IrO2 or RuO2) dissolution.Keywords: Electrodes, platinum, metal oxides, lifetime.

Electrochemical comparative study of Ti/Ta2O5/Pt‐RuO2‐IrO2 and Ti/Ta2O5/Pt anodes: Stability, service lifetime, and electrooxidation performance

“…This could be explained by the presence of the precursor of IrO 2 in the surface of this thermally prepared electrode. Pohan et al 32 . Indeed, the hydrogen adsorption and desorption zone between À0.42 and 0.07 V is noted.…”

Renewability and Robustness Analysis and Review for Sustainable-Technology Propulsion Systems in Modern Transportation Infrastructure Administration

“…The former factor depends on cost-reduction strategies implemented by producers, meaning that more REMs (Rare-Earth Materials), such as platinum, are required to reach an extended fuel cell stack life. Various inert metallic alloys have shown different operating times until requiring replacement, as mentioned in the intense static measurements from [95], a factor that could be used to estimate the FCEV stack life.…”