Effects of sulfation level on the Desulfation behavior of presulfated Pt-BaO/Al 2O 3 lean NO x trap catalysts: A combined H 2 temperature-programmed reaction, in situ sulfur K-edge X-ray absorption near-edge spectroscopy, X-ray photoelectron spectroscopy, and time-resolved X-ray diffraction study

Do Heui Kim, Janos Szanyi, Ja Hun Kwak, Xianqin Wang, Jonathan C. Hanson, Mark Engelhard, Charles H.F. Peden

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