Fig. 2: Structural characterisation. | Nature Communications

Fig. 2: Structural characterisation.

From: Nearly 100% selective and visible-light-driven methane conversion to formaldehyde via. single-atom Cu and Wδ+

Fig. 2

a Raman spectra and b high-resolution W4f XPS spectra of WO3, def-WO3 and Cu0.029-def-WO3. c HRTEM and d aberration corrected HAADF-STEM images of Cu0.029-def-WO3. e x–y line scan curve measured along the yellow rectangle region marked in d. f The optimised configuration of the atomic Cu at A site of def-WO3 over the (002) surface in the top view.

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