XPS and FTIR Investigation of V-Alumina Supported Catalysts Derived from H3Re3(CO)12 and NH4ReO4: A Comparative Study

Z. Zsoldos, A. Beck, L. Guczi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

To clarify the formation of the catalytically active sites in Re-catalysts supported on alumina two different precursors, H3Re3(CO)12 and NH4ReO4, were used as Re-sources. Their comparison helped by TPD, FTIR and peak-synthesis aided XPS methods revealed that the annealing in vacuo or under inert atmosphere leads to an interaction between H3Re3(CO)12 and alumina surface and via two peculiar carbonyl forms it is oxidized, while NH4ReO4 undergoes a reduction due to a thermal decomposition process. Subsequent hydrogenation of both catalysts results in the formation of catalytically active zerovalent rhenium. The extent of this reduction is higher for the NH4ReO4-derived catalyst which directly explains its higher catalytic activity in the CO + H2 reaction.

Original languageEnglish
Pages (from-to)955-964
Number of pages10
JournalStudies in Surface Science and Catalysis
Volume48
Issue numberC
DOIs
Publication statusPublished - 1989

Fingerprint

Aluminum Oxide
Carbon Monoxide
Catalyst supports
Alumina
X ray photoelectron spectroscopy
aluminum oxides
catalysts
Catalysts
Rhenium
Temperature programmed desorption
Hydrogenation
Catalyst activity
Pyrolysis
inert atmosphere
rhenium
Annealing
hydrogenation
thermal decomposition
catalytic activity
annealing

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Catalysis
  • Physical and Theoretical Chemistry
  • Materials Chemistry
  • Surfaces, Coatings and Films

Cite this

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abstract = "To clarify the formation of the catalytically active sites in Re-catalysts supported on alumina two different precursors, H3Re3(CO)12 and NH4ReO4, were used as Re-sources. Their comparison helped by TPD, FTIR and peak-synthesis aided XPS methods revealed that the annealing in vacuo or under inert atmosphere leads to an interaction between H3Re3(CO)12 and alumina surface and via two peculiar carbonyl forms it is oxidized, while NH4ReO4 undergoes a reduction due to a thermal decomposition process. Subsequent hydrogenation of both catalysts results in the formation of catalytically active zerovalent rhenium. The extent of this reduction is higher for the NH4ReO4-derived catalyst which directly explains its higher catalytic activity in the CO + H2 reaction.",
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T1 - XPS and FTIR Investigation of V-Alumina Supported Catalysts Derived from H3Re3(CO)12 and NH4ReO4

T2 - A Comparative Study

AU - Zsoldos, Z.

AU - Beck, A.

AU - Guczi, L.

PY - 1989

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AB - To clarify the formation of the catalytically active sites in Re-catalysts supported on alumina two different precursors, H3Re3(CO)12 and NH4ReO4, were used as Re-sources. Their comparison helped by TPD, FTIR and peak-synthesis aided XPS methods revealed that the annealing in vacuo or under inert atmosphere leads to an interaction between H3Re3(CO)12 and alumina surface and via two peculiar carbonyl forms it is oxidized, while NH4ReO4 undergoes a reduction due to a thermal decomposition process. Subsequent hydrogenation of both catalysts results in the formation of catalytically active zerovalent rhenium. The extent of this reduction is higher for the NH4ReO4-derived catalyst which directly explains its higher catalytic activity in the CO + H2 reaction.

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