M枚ssbauer Spectroscopy: an elegant tool for the active sites identification and quantification in Pt-Sn-In based naphta reforming catalysts
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- 作者：Ali Jahel (1)
Sylvie Lacombe (1)
Priscilla Avenier (1)
Josette Olivier-Fourcade (2)
Jean-Claude Jumas (2) jumas@univ-montp2.fr - 关键词：Naphtha ; reforming catalysts – ; Pt ; Sn ; In M枚ssbauer Spectroscopy – ; PtxSn(O) oxo ; metallic phases
- 刊名：Hyperfine Interactions
- 出版时间：March 2012
- 出版年：2012
- 期刊代码：18_03043843
- 类别：cp
- 卷：207
- 期：1-3
- 页码：37-40
- 数据来源：sp
摘要
Trimetallic PtSnIn/Al<sub>2sub>O<sub>3sub>-Cl catalysts have been synthesized by successive impregnations (SI) of metals and characterized by 119Sn M枚ssbauer Spectroscopy (MS). Various Sn-species have been identified thanks to the use of a Δ (Quadrupole Splitting) – δ (Isomer shift) diagram. 119Sn MS results show that addition of different amounts of In (0.11 to 0.55 wt.%) lead to the formation of Pt<sub>xsub>Sn(O) oxo-metallic phases. As the In loading increases these Pt<sub>xsub>Sn(O) oxo-metallic phases are richer in Pt. The preferential formation of a given Sn phase in these catalysts is directly related to the preparation method.