Tuesday publication update! Oxygen reduction reactions are of particular interest in research to fuel cell cathodes. In this paper, the catalytic performance of platinum alloy nanoparticles is investigated using the #AtmosphereAX system at atomic resultion in an electron microscope. Initial segregation of a thin platinum, rather than cobalt oxide, surface layer is observed while the intermetallic core is ordered, followed by the layer-by-layer growth of a platinum shell via Ostwald ripening during the oxygen annealing treatment. These findings are expected to be useful for the future design of structured platinum alloy nanocatalysts.

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#Protochips #insitucatalysis #electronmicroscopy

2023-09_02 Atmosphere

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