Title :
Determination of adsorbed species in the surface hydrolysis of SOF 2 on activated alumina
Author :
Trudeau, M.L. ; Rochefort, A. ; Fréchette, M.F.
Abstract :
The nature of the species adsorbed in the hydrolysis of SOF2 on activated alumina has been investigated using spectroscopic XPS and FTIR techniques. XPS technique proved to be a convenient tool for determining the amount of adsorbed species, especially when they are strongly bonded. The amount of fluorine detected by XPS confirmed its strong interaction with alumina, although the formation of an alumina-fluorine complex was not observed. With regards to the adsorbed sulfur complexes, the S 2p XPS binding energy (BE) associated with the features of the FTIR spectra (around 1000-1200 cm-1) suggests the presence of both chemisorbed SO3 (sulfite) and SO2 F (fluorosulfite) species on alumina. Lastly, the decreasing amount of oxygenated species detected by XPS suggests that the presence of adsorbed fluorine has a significant impact on the retention capability of alumina toward moisture
Keywords :
Fourier transform spectra; X-ray photoelectron spectra; adsorption; alumina; binding energy; infrared spectra; sulphur compounds; surface chemistry; 1000 to 1200 cm-1; Al2O3; FTIR; SOF2; activated alumina; adsorbed species; alumina-fluorine complex; retention capability; spectroscopic XPS; surface hydrolysis; Acceleration; Bonding; Degradation; Electrochemical impedance spectroscopy; Floods; Hafnium; Kinetic theory; Mercury (metals); Moisture; Sulfur hexafluoride;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1996., IEEE 1996 Annual Report of the Conference on
Conference_Location :
Millbrae, CA
Print_ISBN :
0-7803-3580-5
DOI :
10.1109/CEIDP.1996.564553
