fig2

Figure 2. The XAFS spectroscopy of Pd-Y/C catalyst. (A) Normalized XANES profiles for the 0.5%Pd-Y/C, 0.5%Pd/C and reference samples at the Pd K-edge; Insert image is the first derivatives of the Pd XANES spectra; (B) EXAFS spectra of the Fourier transformed k²-weighted χ(k) data for 0.5%Pd-Y/C, 0.5%Pd/C and references at the Pd K-edge; (C) Normalized XANES profiles for the 0.5%Pd-Y/C catalyst and reference samples at the Y K-edge; Insert image is the first derivatives of the Y XANES spectra; (D) EXAFS spectra of the Fourier transformed k²-weighted χ(k) data for 0.5%Pd-Y/C catalyst and references at the Y K-edge. XAFS: X-ray adsorption fine structure; XANES: X-ray adsorption near-edge structure; EXAFS: extended X-ray absorption fine structure.