Oxidative addition of hydrogen in the “reduced' Mo/Al2O3 catalysts

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• 作者：Startsev ; A.N. ; Klimov ; O.V. ; Sidyakin ; M.V. ; Voroshina ; O.V. ; Tchashkova ; N.A. ; Zakharov ; I.I. ; Pashis ; A.V. ; Kalinkin ; A.V.
• 关键词：temperature ; programmed desorption ; Oxidative addition of hydrogen ; X ; ray photoelectron spectroscopy ; Mo/Al2O3 catalysts
• 刊名：Reaction Kinetics and Catalysis Letters
• 出版年：2003
• 出版时间：2003
• 年：2003
• 卷：80
• 期：1
• 页码：97-103
• 全文大小：105 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Sciences
  Catalysis
  Physical Chemistry
  Industrial Chemistry and Chemical Engineering
  
• 出版者：Akad茅miai Kiad贸, co-published with Springer Science+Business Media B.V., Formerly Kluwer Academic
• ISSN：1588-2837

文摘

An X-ray photoelectron spectroscopy study of Mo/Al₂O₃ catalysts prepared via [Mop>Vp>₂O₄(C₂O₄)₂(H₂O)₂]p>2-p> complexes showed that after heating the catalysts with hydrogen in the spectrometer chamber, the position of the Mo3d line shifted to higher values of binding energy. This shift is interpreted as oxidative addition of hydrogen to the surface Mo species. A similar phenomenon was observed for a CO treated catalyst. A temperature-programmed desorption study has shown that hydrogen is strongly bounded to Mo and can only be removed from the catalysts at temperatures as high as 500°C.p>