Fig. 4: Coordination structures of Au@Pd bimetallic catalysts.
From: Conjugated dual size effect of core-shell particles synergizes bimetallic catalysis
Detailed microstructural evolution information shown in the Fourier transformed k3-weighted χ(k) of the Pd K-edge (a) and Au L3-edge (c) of the Aux@yML-Pd catalysts along with the reference metal foils. The Fourier transforms were not corrected for phase shifts. b, d Fourier transformed EXAFS fitting results of the metal-metal coordination numbers (CNs) for the Aux@yML-Pd bimetallic nanoparticles. Error bars represent the standard deviation. R represents the distance between the absorbing atom and neighboring scattered atoms, and χ(k) denotes the amplitude of the EXAFS oscillations as a function of photoelectron wavenumber k. The inset in b and d shows the models of different sizes of Au2.8@0.6ML-Pd, Au6.8@0.3ML-Pd, Au6.8@2.9ML-Pd, and Au4.3@2.9ML-Pd bimetallic core-shell catalysts, respectively, where the dark blue and yellow balls are Pd and Au atoms.
