Morphology Study of Co/SiO2 Model Catalyst by Electron Microscopy. Effect of Oxidation-Reduction Treatment

• Autorzy: Potoczna-Petru D. , Kępiński L. , Krajczyk L.
• Języki publikacji: EN

Abstrakty

EN

Effect of pretreatment in air (500-1000°C) of Co/SiO2model catalysts on morphology of Co phase formed upon reduction at 700°C in H2 for 4 h has been investigated by electron microscopy. The model catalysts were thin cobalt films (1 and 4 nm thick) on an amorphous layer of SiO2. It is concluded that the morphology of formed Co particles depends on Co loading, state of the surface support and Co-silica interaction in the oxidized state. The size distribution of Co particles and Co dispersion in samples subjected to various pretreatment are discussed. The highest dispersion of Co was observed for samples (4 nm thick) preheated at 800°C.

Słowa kluczowe

EN

Co model catalyst; electron microscopy study; Co-SiO2 interaction

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2004
• Tom: Vol.78 /nr 11-12
• Strony: 2205--2212
• Opis fizyczny: Bibliogr. 15 poz., rys.

Twórcy

autor

Potoczna-Petru D.

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PO Box 1410, 50-950 Wrocław 2, Poland

autor

Kępiński L.

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PO Box 1410, 50-950 Wrocław 2, Poland

autor

Krajczyk L.

• Institute of Low Temperature and Structure Research, Polish Academy of Sciences, PO Box 1410, 50-950 Wrocław 2, Poland

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