Figure 1
Ex situ Co K-edge XANES (A) and FT-EXAFS (B) of Co(NO3)2.6H2O (a), impregnated Co/SiO2 (b) and impregnated Co-TEG(0.25)/SiO2 (c). Pattern-fitting results for impregnated Co/SiO2 and Co-TEG(0.25)/SiO2 using the XANES of Co(NO3)2.6H2O are illustrated by broken lines. The fitting quality (Rf) defined by equation (3) is also indicated in this figure. XAFS spectra were measured at ambient temperature. |