Fig. 1: Preparation and identification of Pd3ZnCx. | Nature Communications

Fig. 1: Preparation and identification of Pd3ZnCx.

From: Co-infiltration and dynamic formation of Pd3ZnCx intermetallic carbide by syngas boosting selective hydrogenation of acetylene

Fig. 1

a Preparation procedure of Pd3ZnCx by syngas. b STEM images of Pd3ZnCx and the corresponding particle size distribution. c Aberration-corrected HAADF-STEM image of Pd3ZnCx; the corresponding EDS line scan (d), and the EDS elemental mapping of Pd L-edge (green) (e), Zn K-edge (purple) (f), C K-edge (yellow) (g). Quasi in situ XPS spectra of Pd 3d (h) and C 1s (i) core levels for PdO/ZnO/Al2O3 fresh sample, PdZn/ZnO/Al2O3 and Pd3ZnCx/ZnO/Al2O3. j Enlarged XRD patterns of Pd3ZnCx/ZnO/Al2O3, Pd3Zn/Al2O3 (α-PdZn), PdZn/ZnO/Al2O3 (β1-PdZn), PdCx/Al2O3 and Pd/Al2O3 for comparison. k Linear correlation between the C:Pd ratio and shift of (111) diffraction peak relative to that of Pd3Zn, predicted by DFT calculation (Diffraction peak shift = −5.88 × C − 0.01; R2 = 0.999).

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