fig2
Figure 2. (A) XRD patterns and (B and C) N2 adsorption-desorption isotherms of the samples. High-resolution XPS spectra of (D) Co 2p, (E) Fe 2p, and (F) C 1s. XRD: X-ray diffraction; XPS: X-ray photoelectron spectroscopy.
Figure 2. (A) XRD patterns and (B and C) N2 adsorption-desorption isotherms of the samples. High-resolution XPS spectra of (D) Co 2p, (E) Fe 2p, and (F) C 1s. XRD: X-ray diffraction; XPS: X-ray photoelectron spectroscopy.
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