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. 2023 Nov 1;14:6994. doi: 10.1038/s41467-023-42794-2

Fig. 1. Characterization of Pd4Cu1-Ni(OH)2 sample.

Fig. 1

a HAADF-STEM image, b high-resolution HAADF-STEM image, c EDS elemental mapping profile of Pd4Cu1-Ni(OH)2 composite structure. d Cu 2p spectra of Pd4Cu1-Ni(OH)2, Pd1Cu1-Ni(OH)2 and Cu-Ni(OH)2. e Normalized Cu K-edge XANES spectra of Pd4Cu1 clusters in reference with Cu foil and CuO, f k3-weighted Fourier-transform Cu K-edge, Pd K-edge and Ni K-edge EXAFS spectra, g the experimental Cu K-edge EXAFS spectrum (red circle) and the fitting curve (black line) of Pd4Cu1. h Wavelet transforms of the k2-weighted Cu K-edge EXAFS signals for the high-coordination shells in reference with Cu foil and CuO. The inset in a shows schematic diagram of Pd4Cu1-Ni(OH)2.