Fig. 2: Characterization of V SACs@1T-WS2 monolayers. | Nature Communications

Fig. 2: Characterization of V SACs@1T-WS2 monolayers.

From: One-step synthesis of single-site vanadium substitution in 1T-WS2 monolayers for enhanced hydrogen evolution catalysis

Fig. 2

a Pictures of different materials formed on the sapphire substrates. Up: V2O3 film; Middle: V SACs@1T-WS2/V2O3 film; down: 2H-WS2. b Optical micrographs of as-grown V SACs@1T-WS2 (up) and 2H-WS2 (down) grown by CVD. c High-resolution HAADF-STEM image for the V SACs@1T-WS2. Inset: the corresponding fast Fourier transform (FFT) of (c). d Left: zoom-in high-resolution STEM image for the V SACs@1T-WS2 indicated by (c). Right: the schematic model of V SACs@1T-WS2. The blue spheres, yellow spheres, and red spheres represent the W atoms, S atoms, and V atoms, respectively. e EELS spectrum of vanadium element in the V SACs@1T-WS2 monolayer. f Intensity profiles of the pink dashed arrow indicated by Fig. 1d. g Low-resolution cross-section HAADF-STEM image of V SACs@1T-WS2/V2O3 film on the sapphire substrate. Inset: the interface between V2O3 and sapphire substrate. h High-resolution HAADF-STEM image of V SACs@1T-WS2 on the V2O3 film; scale bars: (b) up: 10 µm, down: 5 µm; (c) 1 nm, inset: 5 1/nm; (d) 0.5 nm; (g) 20 nm, inset: 1 nm; (h) 1 nm.

Back to article page