Fig. 4

TEM images of (a) 0.2 mol%, (b) 0.5 mol%, (c) 1.4 mol% and (d) 4.2 mol% Ce-bearing post reduction products and corresponding TEM SAED results. Reflections (yellow rings) in sample A are all representative of magnetite (PDF 00-019-0629). Reflections (yellow rings) in B are representative of magnetite and goethite - the reflections of goethite have been marked with red dots to separate them from those of magnetite in the b) 1 mol% sample. Reflections (yellow rings) in sample C and D represent goethite (PDF 00-029-0713)