Strong metal-support interaction between mononuclear and polynuclear transition metal complexes and oxide supports which dramatically affects catalytic activity

Journal Article · Thu Mar 05 00:00:00 EST 1981 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j150605a009· OSTI ID:6585694

Hucul, D A; Brenner, A

The interaction of carbonyl complexes with catalyst supports, primarily ..gamma..-alumina, has been studied by temperature-programmed decomposition. In all cases, including cluster complexes and complexes of noble metals, after heating to 600/sup 0/C in flowing He the catalysts are significantly oxidized due to a redox reaction between surface hydroxyl groups and the initially zero-valent metal. Contrary reports are probably incorrect and likely reflect the insensitivity of the experimental techniques used. For all but the most thermally unstable complexes, the oxidation occurs during the latter stages of decarbonylation indicating that there is no significant accumulation of bare zero-valent metal. Hence, decomposition does not in general provide a direct route to supported metals and, contrary to some claims, molecular cluster complexes cannot necessarily be used as precursors to supported metal clusters. Further, knowledge of this redox reaction is critical for understanding patterns of activity and for the development of improved catalysts.

• Research Organization: Wayne State Univ., Detroit, MI
• OSTI ID: 6585694
• Journal Information: J. Phys. Chem.; (United States), Vol. 85:5
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINIUM OXIDES
CHEMICAL REACTIONS
CATALYST SUPPORTS
CATALYSTS
TRANSITION ELEMENT COMPLEXES
DECOMPOSITION
CARBONYLS
OXIDATION
ALUMINIUM COMPOUNDS
CHALCOGENIDES
COMPLEXES
OXIDES
OXYGEN COMPOUNDS
400201* - Chemical & Physicochemical Properties