Fig. 4: Mechanism of H2O2 and high value-added benzaldehyde photosynthesis of RF/C-TaSA and RF.
a In situ FTIR spectrum analysis of photocatalytic H2O2 and benzaldehyde production over RF/C-TaSA. b In situ EPR spectra of oxygen active species over RF/C-TaSA and RF. The room-temperature EPR spectra were measured after in situ illumination for 5 min by using 5,5-dimethyl-1-pyrroline N-oxide (DMPO) as a trapping agent in pure benzyl alcohol. c The in-situ irradiated Ta 4 f XPS was measured under light irradiation and in darkness. d Projected density of states (PDOS) of C-N2O2 and C-TaN2O2. e Charge density mapping between *C6H5CHOH group and catalysts: (i) C-N2O2 and (ii) C-TaN2O2. The iso-surface of charge density is set to 0.005 e Å−3. The sky-blue and yellow isosurfaces stand for the negative and positive charges, respectively. The dashed lines stand for the Fermi level. f Calculated energy profile of benzyl alcohol oxidation into benzaldehyde at U = 0 V vs. SHE at pH = 7. Source data are provided as a Source Data file.
