Figure 2
Ex situ Co K-edge XANES (A) and FT-EXAFS (B) of Co(NO3)2.6H2O (a), dried Co/SiO2 (b) and dried Co-TEG(0.25)/SiO2 (c). Pattern-fitting results for dried 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. |