407480.fig.001a
(a)
407480.fig.001b
(b)
Figure 1: XRD patterns for: (a) La0.7Sr0.3Fe O 3 - 𝛿 and BaCe0.7Zr0.1Y0.2 O 3 - 𝛿 , and (b) FeCr2O4 catalysts before and after being reduced by H2.