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High surface area Pt/K/Al2O3 catalysts were prepared with a 2-nozzle flame spray method resulting in Pt clusters on γ-Al2O3 and amorphous K storage material as evidenced by Raman spectroscopy. The powders had a high NOx storage capacity and were regenerated fast in a model exhaust gas environment. From 300 to 400 °C no excess NOx was detected in the off gas during transition from fuel lean to...
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