Fig. 5. Normalised Au L_III-edge XANES of a metallic Au as a reference, and the monometallic and bimetallic catalyst samples: (a) an Au foil, (b) the monometallic Au(3.0)/Al₂O₃ sample, and the bimetallic (c) Pd(0.5)Au(2.5)/Al₂O₃, (d) Pd(1.5)Au(1.5)/Al₂O₃, and (e) Pd(2.0)Au(1.0)/Al₂O₃ samples.