Science Advances

Supplementary Materials

This PDF file includes:

  • Supplementary Results and Discussion
  • Table S1. Table of Hansen solubility parameters of selected solvents.
  • Table S2. Summarized XPS data showing differences in atomic ratio of elements for ether-treated and untreated catalysts.
  • Table S3. Summarized XPS data showing differences in C and N speciation for ether-treated and untreated catalysts.
  • Table S4. Summarized calculated BET (Brunauer-Emmett-Teller)–specific surface areas and pore volumes obtained from solvent-treated NrGO catalysts.
  • Fig. S1. High-resolution STEM images of ether-treated GO and NrGO materials.
  • Fig. S2. XRD spectra of starting, intermediate, and end products.
  • Fig. S3. Thermogravimetric analysis of solvent-treated GO samples.
  • Fig. S4. FTIR attenuated total reflectance spectra of water and ice.
  • Fig. S5. High-resolution C 1s XPS spectra for treated GO precursors.
  • Fig. S6. XRD data of ether-treated GO showing the presence of a lamellar KC8 structure at an intermediate temperature (400°C), which disappears at higher temperatures (850°C).
  • Fig. S7. Koutecky-Levich and electrode loading mechanistic studies for ether-treated NrGO catalysts.
  • Fig. S8. Tafel and accelerated durability studies for the ORR on NrGO electrocatalysts.
  • Fig. S9. High-resolution XPS N 1s and Mn 2p spectra for ether-treated and untreated NrGO catalysts.
  • Fig. S10. N2 adsorption isotherms for solvent-treated NrGO catalysts.

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