Fig. 5: Operando spectroscopic studies. | Nature Communications

Fig. 5: Operando spectroscopic studies.

From: Accelerated discovery of multi-elemental reverse water-gas shift catalysts using extrapolative machine learning approach

Fig. 5

A Operando Mo K-edge XANES spectra of Pt(3)/Rb(1)-Ba(1)-Mo(0.6)-Nb(0.2)/TiO2 obtained under a sequential flow of 25% CO2/He, 75% H2/He, and 25% CO2 + 75% H2 at 250 °C (left). Changes in the X-ray energy (at μ = 0.6 eV) and CO concentration in the gas phase (right). B Operando IR measurements for the Pt(3)/Rb(1)-Ba(1)-Mo(0.6)-Nb(0.2)/TiO2 catalyst conducted under a sequential flow of CO2, He, H2, and 25% CO2 + 75% H2 at 200 °C (left). Variations in the intensities of the peaks related to the surface-adsorbed species and concentration of CO in the effluent gas upon the introduction of CO2 (right).

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