Comparison between ESR spectra and activities of bismuth tungstate catalysts |
| |
| Authors: | P K Sinhamahapatra S Sinhamahapatra T K Mukherjee and S K Bhattacharyya |
| |
| Institution: | (1) Department of Chemistry, Faculty of Science, Banaras Hindu University, 221005 Varanasi, India;(2) Present address: Catalyst Section, Indian Institute of Petroleum, P. O. IIP Mohkampur, 248005 Dehradun, India;(3) Present address: Oil Technology Division, Department of Applied Chemistry, University College of Science and Technology, 700009 Calcutta, India;(4) Present address: Azerbaidjan Institute of Petroleum and Chemistry, 20, Lenin Avenue, 370010 Baku, USSR |
| |
| Abstract: | Electron spin resonance absorptions have been studied in bismuth tungstate catalysts with Bi/W ratios of 2/3, 1/1, 2/1 and 6/1. The first three systems exhibit a mean g value of 2.07±0.04 while the last one does not show any ESR signal. All the systems are diamagnetic. The signals at g=2.03–2.11 are attributed to oxygen ion-radicals chemisorbed (O
2
–
) on W6+. An attempt has been made to correlate these whith the catalytic activities of the bismuth tungstates in the oxidation of propylene and 1-butene.
                          Bi/W=2/3, 1/1, 2/1 6/1.   g=2,07±0,04,   .  .  g=2,03 2,11 - (O2
–), W+6.   1-.
|
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
