Fig. 4From: Bioproduction of cerium-bearing magnetite and application to improve carbon-black supported platinum catalystsTEM images of (a) 0.2Â mol%, (b) 0.5Â mol%, (c) 1.4Â mol% and (d) 4.2Â 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) 1Â mol% sample. Reflections (yellow rings) in sample C and D represent goethite (PDF 00-029-0713)Back to article page