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

D. Teschner, A. Wootsch, Z. Paál

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Abstract

PROX reaction was studied over an unsupported PtSn catalyst. CO2 and H2O were produced from a H2 flow containing 1% CO, and 0.4-2% 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.

Original languageEnglish
Pages (from-to)31-34
Number of pages4
JournalApplied Catalysis A: General
Volume411-412
DOIs
Publication statusPublished - Jan 16 2012

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Keywords

  • In situ XPS
  • PROX reaction
  • PtSn catalyst

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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