Fig. 1: Morphology characterisation of SeFe‒C2N.
From: Precisely designing asymmetrical selenium-based dual-atom sites for efficient oxygen reduction
a Illustration of the fabrication of SeFe‒C2N. b TEM image of SeFe‒C2N. c STEM image and elemental mapping of SeFe‒C2N. d HAADF-STEM image of SeFe‒C2N, showing the dual atoms (yellow ellipse) dispersed in the C2N substrate. e Intensity profiles highlighted along the red dotted line in d. f 3D model of dual-atom Se‒Fe bright spots along the red dotted line and g corresponding intensity profiles around location #1 in d.
