TY - JOUR
T1 - Surface structures of vanadium oxide supported on aluminas characterized by ultraviolet and visible raman spectroscopy
AU - Wu, Zili
AU - Kim, Hack Sung
AU - Rugmini, Sreekala
AU - Jackson, S. David
AU - Stair, Peter C.
PY - 2005
Y1 - 2005
N2 - Supported vanadia catalyst have attracted significant interest due to their good catalytic performance in many redox reactions, e.g., dehydrogenation and oxidative dehydrogenation of alkanes to olefins, oxidation of methanol to formaldehyde, and selective reduction of NOx. The structure of VOx supported on alumina (δ-, α-, and γ-Al2O3) was studied using different techniques. UV Raman spectra of hydrated V-δ-Al2O3 were similar to the visible spectra. Comparing the UV and visible Raman spectra of V/δ-Al2O3 samples, two kinds of V=O band shift could be distinguished: a shift as a function of excitation wavelength for the same sample and a shift as a function of surface VOx density for different samples. The Raman, UV-visible DRS, and H2-TPR results showed that the structure, distribution, and reducibility of surface VOx species on γ-Al2O3 are similar to those on δ-Al2O3. This is an abstract of a paper presented at the ACS Fuel Chemistry Meeting (San Diego, CA Spring 2005).
AB - Supported vanadia catalyst have attracted significant interest due to their good catalytic performance in many redox reactions, e.g., dehydrogenation and oxidative dehydrogenation of alkanes to olefins, oxidation of methanol to formaldehyde, and selective reduction of NOx. The structure of VOx supported on alumina (δ-, α-, and γ-Al2O3) was studied using different techniques. UV Raman spectra of hydrated V-δ-Al2O3 were similar to the visible spectra. Comparing the UV and visible Raman spectra of V/δ-Al2O3 samples, two kinds of V=O band shift could be distinguished: a shift as a function of excitation wavelength for the same sample and a shift as a function of surface VOx density for different samples. The Raman, UV-visible DRS, and H2-TPR results showed that the structure, distribution, and reducibility of surface VOx species on γ-Al2O3 are similar to those on δ-Al2O3. This is an abstract of a paper presented at the ACS Fuel Chemistry Meeting (San Diego, CA Spring 2005).
UR - http://www.scopus.com/inward/record.url?scp=22144498136&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:22144498136
SN - 0569-3772
VL - 50
SP - 181
EP - 182
JO - ACS Division of Fuel Chemistry, Preprints
JF - ACS Division of Fuel Chemistry, Preprints
IS - 1
ER -