Science Advances

Supplementary Materials

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  • Results
  • fig. S1. TEM image for cubic Pd-NPs and CV profiles of HUPD adsorption and desorption, H absorption, and Habs desorption.
  • fig. S2. Plots of δΔG°(HUPD) as a function of θH for the five temperature values.
  • fig. S3. Plots of Δec-adsS°(HUPD) (purple) and Δec-desS°(HUPD) (red) as a function of θH.
  • fig. S4. Plots of δΔH°(HUPD) as a function of θH for the five temperature values.
  • fig. S5. Adsorption and desorption isotherms for HUPD; plots of Δec-adsG°(HUPD), Δec-desG°(HUPD), Δec-adsH°(HUPD), Δec-desH°(HUPD); and EPd HUPD as a function of θH for the five temperature values.
  • fig. S6. H absorption and Habs desorption isotherms, van’t Hoff plots, and plots of Δec-absH°(Habs) and Δec-desH°(Habs) as a function of XH for the five temperature values.
  • fig. S7. Plot of δΔH°(Habs) as a function of XH.
  • fig. S8. Plots of Δec-absS°(Habs) and Δec-desS°(Habs) as a function of XH.
  • fig. S9. Plots of Δec-absG°(Habs), Δec-desG°(Habs), and δΔG°(Habs) as a function of XH for the five temperature values.
  • fig. S10. Visualization of the Oh and Td sites on the fcc(111) surface.
  • fig. S11. Variation of Δμe- (XH) as a function of XH.
  • table S1. Properties of 0.50 M aqueous H2SO4 solution.
  • References (31, 32)

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