Co-support compound formation (Co-SCF) in Co/TiO2 was found during standard reduction resulting in a lower reducibility of the catalyst. The compound formed is considered to be non-reducible at temperatures < 800 &DEG;C during TPR and different from CoTiO3. The characteristics of Co-SCF were investigated using BET surface area, XRD, Raman spectroscopy, SEM/EDX, and TPR.