A Strategy for Designing a Concave Pt–Ni Alloy through Controllable Chemical Etching


  • This work was supported by the State Key Project of Fundamental Research for Nanoscience and Nanotechnology (2011CB932401 and 2011CBA00500), the National Natural Science Foundation of China (Grant No. 20921001 and 21131004).


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This corrosion: Octahedral Pt–Ni alloy nanoparticles (NPs) are converted into concave Pt3Ni NPs by a coordination-assisted chemical-etching process (see scheme). The corroded concave Pt–Ni NPs have a higher density of low-coordinate atoms in steps sites, a decisive property in heterogeneous catalysis.