Fig. 1: Microscopic structures of 0.75Pt0.2Fe/ND@G.
From: Fully-exposed Pt-Fe cluster for efficient preferential oxidation of CO towards hydrogen purification
a, b HAADF-STEM images of 0.75Pt0.2Fe/ND@G at high magnification. c Energy-dispersive X-ray (EDX) mapping images of 0.75Pt0.2Fe/ND@G catalyst. d, e The high resolution HAADF-STEM image of the 0.75Pt0.2Fe/ND@G, where representative isolated Pt, Fe atoms and atomic Pt-Fe clusters are highlighted by red, green circles and dashed blue rectangles, respectively. f 3-D intensity surface plot and intensity range shown for the dashed regions of the image in e. Scale bar: a, 2 nm; b 2 nm; c, 2 nm; d 0.5 nm; e 0.5 nm.
