Fig. 4: Structural characterization of PtCu/MgO catalysts during CO oxidation. | Nature Communications

Fig. 4: Structural characterization of PtCu/MgO catalysts during CO oxidation.

From: Unraveling distinct effects between CuOx and PtCu alloy sites in Pt−Cu bimetallic catalysts for CO oxidation at different temperatures

Fig. 4

a aberration-corrected HAADF-STEM images of PtCu/MgO after catalytic CO oxidation, (b) the line scan results of PtCu/MgO after catalytic CO oxidation, (c) synchrotron XRD pattern, (d) in-situ Pt L3-edge XANES profiles, (e) in-situ Pt L3-edge EXAFS profiles (the data are k2-weighted and not phase-corrected), (f) the average oxidation state of Pt in PtCu/MgO catalysts from XANES spectra, (g) in-situ Cu K-edge XANES profiles, (h) in-situ Cu K-edge EXAFS profiles (the data are k3-weighted and not phase-corrected), (i) the average oxidation state of Cu in PtCu/MgO catalysts from XANES spectra, and (j) Schematic illustration of CuOx /PtCu Alloy.

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