Figure 2. HR-XPS spectra of (A) Fe 2p, (B) Co 2p, (C) Ni 2p, (D) Cu 2p, and (E) Mo 3d of FCNCuMOX@CNT and FCNCuM@CNT. HR-XPS: High-resolution X-ray photoelectron spectroscopy; CNTs: carbon nanotubes.
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