428643.fig.002a
(a)
428643.fig.002b
(b)
428643.fig.002c
(c)
428643.fig.002d
(d)
Figure 2: FE-SEM images of the NiLaxFe2−xO4 catalysts, being calcined at 500°C, ( (a), (b), and (c)); EDX pattern of the SEM image of the catalyst with .