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Journal Article

Preferential CO oxidation in hydrogen (PROX) on unsupported PtSn catalyst


Teschner,  Detre
Institute of Isotopes of the Hungarian Academy of Sciences;
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Teschner, D., Wootsch, A., & Páal, Z. (2012). Preferential CO oxidation in hydrogen (PROX) on unsupported PtSn catalyst. Applied Catalysis A: General, 411-412, 31-34. doi:10.1016/j.apcata.2011.10.017.

Cite as: https://hdl.handle.net/11858/00-001M-0000-000F-3A81-6
PROX reaction was studied over an unsupported PtSn catalyst. CO2 and H2O were produced from a H2 flow containing 1% CO, and 0.4 to 2% O2. PtSn pretreated with O2 and H2 contained more Pt in the near-surface region and was more active towards CO oxidation than a sample pretreated in H2 only. In-situ XPS was also carried out during PROX reaction. Sn 3d indicated the presence of Sn-oxides, near to the surface region, along with Pt3Sn. Pt 4f peak showed metallic Pt under all conditions. Water and OH enrichment was observed in the O 1s spectrum, taken during PROX reaction.