Phase behavior of a Pd-Cu bimetallic catalyst during temperature-programmed reduction

被引:6
作者
FernandezGarcia, M [1 ]
Haller, GL [1 ]
机构
[1] YALE UNIV,DEPT CHEM ENGN,NEW HAVEN,CT 06520
来源
JOURNAL DE PHYSIQUE IV | 1997年 / 7卷 / C2期
关键词
D O I
10.1051/jp4:1997269
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The phase behavior of a 1%Pd-0.5%Cu bimetallic catalyst during reduction has been followed by X-ray absorption near-edge structure (XANES). The analysis of the XANES spectra by Factor Analysis was used to determine that after calcination the active components are hosted in three different phases: a Cu-Pd mixed oxide, PdO and Cun+ ions exchanged into L-zeolite positions. At the Pd K-edge, an intermediate compound is detected in the reduction process. The reduction of the catalyst yields only one phase, a substitutionally disordered Pd50Cu50 alloy.
引用
收藏
页码:895 / 896
页数:2
相关论文
共 5 条
[1]   XANES-TPR STUDY OF CU-PD BIMETALLIC CATALYSTS - APPLICATION OF FACTOR-ANALYSIS [J].
FERNANDEZGARCIA, M ;
ALVAREZ, CM ;
HALLER, GL .
JOURNAL OF PHYSICAL CHEMISTRY, 1995, 99 (33) :12565-12569
[2]   NEW INSIGHTS ON THE MECHANISM OF THE NO REDUCTION WITH CO OVER ALUMINA-SUPPORTED COPPER-CATALYSTS [J].
FERNANDEZGARCIA, M ;
ALVAREZ, CM ;
RODRIGUEZRAMOS, I ;
GUERRERORUIZ, A ;
HALLER, GL .
JOURNAL OF PHYSICAL CHEMISTRY, 1995, 99 (44) :16380-16382
[3]  
FERNANDEZGARCIA M, UNPUB
[4]   A PRIORI ESTIMATES OF THE ELUTION PROFILES OF THE PURE COMPONENTS IN OVERLAPPED LIQUID-CHROMATOGRAPHY PEAKS USING TARGET FACTOR-ANALYSIS [J].
GEMPERLINE, PJ .
JOURNAL OF CHEMICAL INFORMATION AND COMPUTER SCIENCES, 1984, 24 (04) :206-212
[5]  
Malinowski F.R., 1991, Factor Analysis in Chemistry