|
|||||
|
|
Nitrosyl complexes on Co–ZSM-5: an FTIR spectroscopic study |
|
| Authors: | K Hadjiivanov E Ivanova M Daturi J Saussey and J -C Lavalley |
| Institution: | a Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, ak. G. Bontchev str., bl 11, Sofia 1113, Bulgaria b Laboratoire Catalyse et Spectrochimie, CNRS-ISMRA, Université de Caen, 6, bd Maréchal Juin, Caen Cedex 14050, France |
| Abstract: | Adsorption of NO on Co–ZSM-5 results in formation of three kinds of Co3+–NO species (1970, 1957 and 1940 cm−1) and Co2+(NO)2 dinitrosyls (1894 and 1811 cm−1). All these species disappear after evacuation at elevated temperatures. However, a very short evacuation of the sample with preadsorbed NO at 673 K, followed by quenching to room temperature, results in appearance of a band at 1857 cm−1. This band is assigned to Co2+–NO linear species produced after partial destruction of the dinitrosyls. The reasons for the different pathways of the dinitrosyl decomposition are discussed. |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ | |