Figure 20.

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XANES spectra at the Pt L3 edge for reduced monometallic Pt/Al2O3-Cl, bimetallic PtSn/Al2O3-Cl and trimetallic PtSnIn/Al2O3-Cl catalysts (with variable In loadings) obtained by successive impregnations E 0 values (eV) of reduced catalysts and shifts in E 0 (ΔE 0) relative to reduced (500°C, 2 h, H2) Pt/Al2O3-Cl.