Preparation of a Nitrogen-Doped Reduced Graphene Oxide-Modified Graphite Felt Electrode for VO²⁺/VO₂⁺ Reaction by Freeze-Drying and Pyrolysis Method

Figure 5

XPS spectra and curve fit of N1s spectra from the prepared N-rGO-500/GF (a), N-rGO-700/GF (b), and N-rGO-900/GF (c).

(a)

(b)

(c)