RESEARCH / A0422
Dynamic evolution of vanadia sites in dendritic mesoporous silica nanospheres for selective oxidation of methane to formaldehyde
Read the original paper · 10.1016/j.ces.2025.121289 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Fig. 5. (a) The Raman spectra of 4.2 V-DMSN under air atmosphere upon an increase of temperature from 30 to 500 ◦C, (b) V K-edge XANES spectra and (c) k2- weighted Fourier transforms of EXAFS spectra for V2O5 and 4.2 V-DMSN under 30 ◦C and 400 ◦C. (d) IR spectra of 4.2 V-DMSN under air atmosphere upon an increase of temperature from 30 to 500 ◦C. (e) The Pyridine-absorbed IR spectra of V-DMSN with various loadings. (f) Possible evolution of vanadium species on 4.2 V-DMSN during the thermal pretreatment.