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The Influence of Preparation Methods on Structural and Catalytic Properties of Transition Metal Ions Supported on Alumina

Elsevier Science & Technology
DOI: 10.1016/s0167-2991(08)63972-5


Summary It is shown that when transition metal ions (Mn, Co, Ni and Cu ions) are supported on γ- and η-Al2O3, at 600°C, two reactions occur concurrently: one leads to the formation of a spinel and the other to a segregation of an oxide. The factors which effects both reactions are discussed. It is also shown how the addition of small amounts of foreign ions, such as Zn2+, Ga3+and Ge4+, affects the interaction between the transition ions and the aluminas. Simple catalytic tests show how the catalytic activity is influenced by the type of compound which is formed on the aluminas surface.

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