Fig. 7: Hypothesized mechanism of photocatalytic CO2RR. | Nature Communications

Fig. 7: Hypothesized mechanism of photocatalytic CO2RR.

From: Photocatalytic asymmetric C-C coupling for CO2 reduction on dynamically reconstructed Ruδ+-O/Ru0-O sites

Fig. 7

In situ DRIFTS spectra of a 3.0%RuxIn2-xO3/SiO2 and b In2O3 catalysts at CO2 + H2O(g) atmosphere under dark and time-resolved illumination for 105 min (with interval of 15 min); c corresponding time-resolved dynamic absorbance profile of *COlinear at 2047 cm−1, *CObridged at 1843 cm−1, *CHO at 1748 cm−1 and *COCHO species in In situ DRIFTS spectra over 3.0%RuxIn2-xO3/SiO2; d In situ Raman spectra of 3.0%RuxIn2-xO3/SiO2 (i) and In2O3 (ii) catalysts at CO2 + H2O(g) atmosphere under dark and time-resolved illumination for 105 min (with interval of 15 min); e free energy diagram of CO2RR to ethanol by *COOH pathway on the (222) surface of Ru SAs sites of RuxIn2-xO3 and In2O3 (insert: illustration of energy barrier of *CO-*CO, *CO-*CHO and *CHO-*CHO coupling); f hypothesized mechanism illustration of photocatalytic CO2RR towards ethanol production on the surface of Ru SAs sites.

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