Fig. 2 | Nature Communications

Fig. 2

From: Energy-efficient CO2 hydrogenation with fast response using photoexcitation of CO2 adsorbed on metal catalysts

Fig. 2The alt text for this image may have been generated using AI.

Dependence on light intensity and light wavelength. a, b CO2 conversion for CO2 hydrogenation on Ru/SiO2 and Rh/SiO2 when the light intensity was varied. To clarify the relation between the light intensity and CO2 conversion enhanced by the light, thermal CO2 conversion without light was subtracted from light-assisted CO2 conversion (ΔCO2 conversion). Light intensity after passing the sapphire window was measured by a spectroradiometer. c, d In-situ UV–Vis spectroscopy in CO2 flow (black lines) and quantum yield for wavelength-dependent measurement of CO2 hydrogenation on Ru/SiO2 or Rh/SiO2 (red or blue dots). Error bars in x-direction indicates full-width at half maximum intensity of monochromatic light. Error bars in y-direction indicates a deviation among three different measurements. The in-situ UV–Vis spectroscopy and CO2 conversion was measured at 150 °C for Ru/SiO2 and 200 °C for Rh/SiO2

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