fig3
Figure 3. (A) XPS full spectra; high-resolution XPS spectra for (B) C 1s, (C) N 1s and (D) Co 2p of Co@CNTs and Co SAs/NPs@N-CNTs. XPS: X-ray photoelectron spectroscopy; CNTs: carbon nanotubes; SAs: single atoms; NPs: nanoparticles.
Figure 3. (A) XPS full spectra; high-resolution XPS spectra for (B) C 1s, (C) N 1s and (D) Co 2p of Co@CNTs and Co SAs/NPs@N-CNTs. XPS: X-ray photoelectron spectroscopy; CNTs: carbon nanotubes; SAs: single atoms; NPs: nanoparticles.
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