Fig. 1: XRD Patterns, Raman spectra, XPS spectra, and SEM images of these electrodes. | NPG Asia Materials

Fig. 1: XRD Patterns, Raman spectra, XPS spectra, and SEM images of these electrodes.

From: Tailoring the d-band center of N-doped carbon nanotube arrays with Co4N nanoparticles and single-atom Co for a superior hydrogen evolution reaction

Fig. 1

a XRD patterns. b Raman spectra. c XPS broad survey spectra and core level spectra of: d Co 2p, e N 1s, and f C 1s of (I) Co@CoSA/N-CNT/CC, (II) Co4N@CoSA/N-CNT/CC, and (III) Co4N/CC. SEM images of g–i Co@CoSA/N-CNT/CC and j–l Co4N@Co SAs/N-CNTs/CC.

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