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EDX element mapping of 8 wt %Ni-5 wt %Fe/MgAl2O4. (A) After H2-reduction (1 mL/s of 5%H2/Ar mixture at a total pressure of 101.3 kPa and 1123 K). (B) After CO2 oxidation (1 mL/s of CO2 at a total pressure of 101.3 kPa and 1123 K). Red and green colors correspond to Fe and Ni elements respectively. Obtained from [17].
