Values of hydrogen production were similar using either Fe2O3
sub-micron powders during the preparation or 20–40 lm powders
as can be seen in Fig. 9b. Differences observed between the OCMs
LSF-30Fe-MM-P and LSF-30Fe-MM-20-40, both prepared by
mechanical mixing, are due to a different mass of the sample used
in the CATLAB. Data shown in the graph are not normalized.