Science Advances

Supplementary Materials

The PDF file includes:

  • Supplementary Text
  • Fig. S1. Formation of the bimetallic domain structures.
  • Fig. S2. Oxygen-induced surface restructuring.
  • Fig. S3. Statistical analysis plots for NiO1− x clusters.
  • Fig. S4. Direct observation of the Pt3Ni(111) after CO/O2 gas evacuation.
  • Fig. S5. AP-XPS analysis at 100 mtorr of O2.
  • Fig. S6. Tracking the mass profiles at room temperature.
  • Fig. S7. AP-XPS analysis in mixed CO/O2 gas at elevated temperature.
  • Fig. S8. Arrhenius plots for catalytic activity measurements.
  • Fig. S9. Model structures of the interfacial Pt-NiO1− x and NiO/Pt3Ni.
  • Fig. S10. Energy profile for CO oxidation on the Pt(111).
  • Fig. S11. Activation barriers for the CO oxidation reaction (CO* + O* → CO2) for different O* configurations on the model surfaces.
  • Fig. S12. Energy profile for O2 dissociation on the Pt(111) surface and on the interfacial Pt-NiO1− x nanostructure.
  • Legend for movie S1

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Other Supplementary Material for this manuscript includes the following:

  • Movie S1 (.avi format). Time-lapse AP-STM movie on the Pt3Ni(111) surface under mixed CO/O2 (1:5 ratio) gas at 300 K.

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