Fig. 4: Photo-chemical properties. | Nature Communications

Fig. 4: Photo-chemical properties.

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

Fig. 4

a Conduction band minimum and b Valence band maximum charge distributions of Cu-def-WO3. The grey, red and blue balls represent W, O and Cu atoms, respectively. In situ EPR monitor of c ·OOH and d ·OH radicals trapped by DMPO over WO3, def-WO3 and Cu0.029-def-WO3 under light. e Time-dependent PL intensity of 7-hydroxycoumain from the reaction of coumarin and ·OH over WO3, def-WO3 and Cu0.029-def-WO3. f GC-MS of the produced HCHO with isotopic labelled H218O or 18O2 in the presence of 19 bar CH4 and 1 bar O2 and 3 mL H2O over Cu0.029-def-WO3.

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