Regeneration Strategies for Ruthenium-Poisoned ORR Catalysts in Reformate PEM Fuel Cells
Qiang Guo,
Frédéric Hasché,
Mehtap Oezaslan
Abstract:PEM fuel cells operating on reformate gases suffer from Ru crossover and its re-deposition in the cathode catalyst layer. Therefore, strategies for regeneration of Ru-poisoned ORR catalysts are needed. Here, we developed a regeneration protocol and tested this for commercial PtRu2/Vulcan, which represents a worst case scenario of Ru-poisoned ORR catalysts due to the high Ru content and good intermixture with Pt. Our protocol consists of two chronoamperometric cycles, namely at 1.4 VRHE for 5 minutes followed b… Show more
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