Effect of titania on the characteristics of a Tin-Platinum catalyst

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• 作者：P. Morales-Gil ; N. Nava ; E. Baggio-Saitovitch
• 关键词：M?ssbauer spectroscopy ; Pt ; Sn Catalyst ; Dehydrogenation
• 刊名：Hyperfine Interactions
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：232
• 期：1-3
• 页码：59-66
• 全文大小：712 KB
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• 作者单位：P. Morales-Gil (1)
  N. Nava (1)
  E. Baggio-Saitovitch (2)
  
  1. Instituto Mexicano del Petróleo, Eje Lázaro Cárdenas 152, México D.F., 0773
  2. Centro Brasileiro de Pesquisas Físicas, Rua Dr. Xavier Sigaud 150, CEP 22290-180, Rio de Janeiro, Brasil
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Nuclear Physics, Heavy Ions and Hadrons
  Atoms, Molecules, Clusters and Plasmas
  Condensed Matter
  Surfaces and Interfaces and Thin Films
  
• 出版者：Springer Netherlands
• ISSN：1572-9540

文摘

Pt-Sn bimetallic catalysts dispersed on alumina are commonly used for reforming and dehydrogenation reactions. In this research work, Pt and Sn were supported on titania. The resulting interactions between the components in the prepared samples, before and after treatment with hydrogen, were studied by M?ssbauer spectroscopy, X-ray diffraction and Rietveld refinement. The results show the presence of Pt and SnO2 after calcinations. After the reduction process, metallic Pt, PtSn, and Pt3Sn alloys were identified. The Rietveld refinement analysis shows that some Ti4+ atoms were replaced by Sn4+ atoms in the titania structure. Finally, the M?ssbauer spectroscopy and X-ray diffraction results indicate that metallic platinum and SnO2 are encapsulated by a TiOx layer.