ELECTRON PARAMAGNETIC RESONANCE OF NO ADSORBED ON REDUCED CHROMIA-ALUMINA

被引：17

作者：

SHELEF, M

机构：

[1] Fuel Sciences Department, Scientific Laboratory, Ford Motor Company, Dearborn

来源：

JOURNAL OF CATALYSIS | 1969年 / 15卷 / 03期

关键词：

D O I：

10.1016/0021-9517(69)90291-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

An anisotropic EPR signal has been observed after contact of pre-reduced samples of dilute (0.086-2.31% Cr) chromia-on-alumina with NO. This paramagnetic species is very stable when isolated from ambient conditions but extremely sensitive to oxidation. The width of the signal is independent of temperature or of the Cr concentration in the solid support. The intensity of the signal passes through a maximum as a function of the Cr concentration. The temperature dependence of the signal intensity follows the Curie-Weiss law. The signal is assumed to be associated with the Cr(I) entity resulting from the transfer of the antibonding electron from a chemisorbed NO molecule to a reduced chromous surface site. © 1969.

引用

页码：289 / &

共 17 条

[1] GUIDELINES FOR INTERPRETING ELECTRON SPIN RESONANCE SPECTRA OF PARAMAGNETIC SPECIES ADSORBED ON SURFACES [J].