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. 2015 Oct 9;6:8550. doi: 10.1038/ncomms9550

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(a–d) HAADF-STEM images with (c) coloured intensity map from selected region, and (e) EXAFS k³-weighted Fourier transforms. (a,d) Typical regions of the sample Pt_0.1Cu₁₄/Al₂O₃, showing Cu metal particles with isolated Pt atoms. Isolated Pt atoms are highlighted with circles. The lattice spacing of Cu is 0.21 nm. Scale bars, 5 nm (a) and 2 nm (d). (b) Enlarged image and (c) colorized intensity map of highlighted region showing isolated Pt atoms. (e) EXAFS data were collected at Pt-L_III edge at room temperature from Pt foil and in H₂ atmosphere at Pt-L_III edge at room temperature from pre-reduced Pt_0.1Cu₁₄/Al₂O₃, Pt_0.2Cu₁₂/Al₂O₃ and Pt₂Cu₆/Al₂O_3.