Abstract
The effect of the cobalt particle size in the ethanol oxidative steam reforming reaction for hydrogen production was investigated using cobalt on carbon nanofiber catalysts. The smallest (<4 nm) particles showed a significantly larger amount of acetaldehyde and smaller amount of H 2 as compared to larger ones. This result indicated that the C–C cleavage is more difficult on small Co particles under OSR conditions, which was due to a higher extent of surface oxidation of smaller particles in this reaction. The catalysts with larger Co particles (>4 nm) were quite stable during OSR reaction but significant carbon formation was detected.
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