Fig. 3From: Determining the Catalytic Activity of Transition Metal-Doped TiO2 Nanoparticles Using Surface Spectroscopic AnalysisThe doped transition metal L-edge and Ti L-edge XAS spectra of 5 mol% TM-TiO2: a and f Cr-TiO2, b and g Mn-TiO2, c and h Fe-TiO2, d and i Co-TiO2, and e and j Ni-TiO2. k The plot of ratio between pre-edge peak a and t 2g peak for bare TiO2 and the five TM-TiO2 Back to article page