A COPPER SILICA CATALYST PREPARED FROM A MONOLAYER FILM OF COPPER 2,2'-BIPYRIDINE DIMER ON CAB-O-SIL

被引:10
作者
CHOKSI, HN
ZIPPERT, A
BERDAHL, P
BERTRAND, JA
PERRY, DL
MITCHELL, MB
WHITE, MG
机构
[1] GEORGIA INST TECHNOL,SCH CHEM ENGN,ATLANTA,GA 30332
[2] GEORGIA INST TECHNOL,SCH CHEM & BIOCHEM,ATLANTA,GA 30332
[3] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94720
[4] CLARK ATLANTA UNIV,DEPT CHEM,ATLANTA,GA 30310
关键词
COPPER; NO DECOMPOSITION; POLYNUCLEAR COPPER COMPLEX; SILICA; SQUID; SUPPORTED CATALYSTS;
D O I
10.1016/1381-1169(94)00065-4
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
A dinuclear copper complex was supported as a monolayer film on Cab-O-Sil (2.27 wt% Cu) as a model for Cu/silica. The supported and unsupported metal complexes were characterized by elemental analyses, EPR, SQUID, DRIFTS, and mass spectrometry (EI and FAB) techniques. The magnetic properties and infrared vibrational spectra were altered when the complex interacted strongly with the support by an ion exchange mechanism. The samples were subsequently decomposed by heating in oxygen to produce a highly dispersed supported CuO/silica. This sample was reduced in H-2 and the catalyst was exposed to NO and N2O under controlled conditions in separate experiments. The results of these characterizations are discussed in the framework of the theories of catalytic ensembles.
引用
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页码:85 / 99
页数:15
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