Abstract
An application of time-of-flight secondary ion mass spectrometry (TOF-SIMS) to the surface investigations of Co/Al 2 O 3 catalyst is presented. The chemical composition of catalyst surface was determined. Moreover, the presence of interactions between metal oxide and support was confirmed. Owing to the calculation of CoO 2 + /CoO + , CoO 3 + , /CoO + and CoO 3 + /CoO 2 + intensity ratios the estimation of cobalt reduction degree was possible. A considerable part of this work was devoted to the investigations of metal distribution on the catalyst surface. TOF-SIMS surface images gave evidence of the cobalt dispersion improvement after sample reduction.
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