EXAFS Peaks and TPR Characterizing Bimetallic Interactions: Effects of Impregnation Methods on the Structure of Pt-Ru/C Catalysts

Figure 5

Illustration of the EXAFS contributions characterizing the metal-carbon interactions. (a) Imaginary part and magnitude of Fourier transform (𝑘³-weighted, 3.5<𝑘<13Å⁻¹, Pt-C phase corrected) of raw EXAFS data at Pt L_III edge minus calculated metal-metal contributions (Pt-Pt + Pt-Ru) for Pt-Ru_co/C (black line) and Pt-Ru_se/C (red line); (b) imaginary part and magnitude of Fourier transform (𝑘¹-weighted, 3.0<𝑘<14Å⁻¹, Ru-Cl phase corrected) of raw EXAFS data at Ru K edge minus calculated metal-metal contributions (Ru-Ru + Ru-Pt) for Pt-Ru_co/C (black line) and Pt-Ru_se/C (red line).

(a)

(b)