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février 2020 :

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Accueil > Séminaires > 2014

Stability of IrO2 and RuO2 model catalysts for PEM water electrolyzer

Luiz Oliveira, LCPQ (Toulouse)

Séminaire LCPQ

Salle de séminaire IRSAMC

Hydrogen energy refers to the possibility of using H2 to transport and produce energy. There are different methods to produce H2, among them, water electrolysis. Regarding the existing devices used for the production of hydrogen from water electrolysis, the so-called polymer electrolyte membrane water electrolyzer (PEMWE) has gained attention in the last years due to its unique features.

In this talk a continuum model, that has been developed at the CEA-Grenoble for the analysis of the behavior of PEMWEs, at the device-scale, will be presented. Such model allows one to study the impact of different catalyst materials and cell operation conditions on the performance of a PEMWE.

In the second part of the talk consideration of phenomena at the atomistic scale will be discussed in more details. This will be done based on results coming from density functional theory (DFT) calculations. Such calculations were performed to provide a detailed description of the adsorption of water on IrO2 and RuO2 surfaces, two of the most used catalyst materials in a PEMWE. Finally, a possibility to inject such atomistic data into the continuum model, presented in the first part of the talk, will be discussed.