Figure 10
SEM secondary electron image of the La0.6 sample after reduction in wet H2 at 675 °C. A regularly shaped particle is visible in the centre. An EDX scan was performed along the green line crossing the particle. The overlaid diagram shows the net intensity of Fe, O and La peaks in the recorded EDX spectra. When crossing the particle in the centre of the image, the Fe L peak increases, while the O K peak and the La M peak decrease. The positions of the extremal slopes of the Fe signal are marked with yellow lines. These positions coincide with the edges of the particle in the secondary electron image. The particle diameter in the direction of the line is 350 nm. In contrast, the signals do not change when crossing the particle on the right, which is just a crumbled piece of the perovskite material. |