Fig. 2: TEM images, high-resolution TEM images of Co@CoSA/N-CNT and Co4N@CoSA/N-CNT, and HAADF-STEM images of Co4N@CoSA/N-CNT. | NPG Asia Materials

Fig. 2: TEM images, high-resolution TEM images of Co@CoSA/N-CNT and Co4N@CoSA/N-CNT, and HAADF-STEM images of Co4N@CoSA/N-CNT.

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. 2

a, b TEM images and c high-resolution TEM images of Co@CoSA/N-CNT. d, e and (g) TEM images, f high-resolution TEM images, h, i the corresponding HAADF-STEM, j–l elemental mappings, and m, n magnified HAADF-STEM image of Co4N@CoSA/N-CNT.

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