IRG-I Highlight: A step toward developing better fuel cells for electric cars and more
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Aberration corrected high-angle annular dark-field (HAADF) images of acid treated “Pt3Co” sample reveal the existence of percolated surfaces with Pt-rich and Co-rich regions (top left figure). In the annealed “Pt3Co” sample, Pt segregates in the top surface and Co is enriched in the next layer (top right figure, the atomic model of the highlighted particle is inserted). The segregated structures enable more significant modifications on the bond distance and the electronic structure of surface Pt atoms, which leads to greatly enhanced catalytic activity.
