NAY ZEOLITE-SUPPORTED RE-PT CATALYSTS PREPARED FROM ORGANOMETALLIC PRECURSORS - EVIDENCE OF THE RE-PT INTERACTION FROM INFRARED AND X-RAY-ABSORPTION SPECTROSCOPIES

被引：20

作者：

PURNELL, SK ^{[1
]}

CHANG, JR ^{[1
]}

GATES, BC ^{[1
]}

机构：

[1] UNIV DELAWARE,CTR CATALYT SCI & TECHNOL,DEPT CHEM ENGN,NEWARK,DE 19716

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1993年 / 97卷 / 16期

关键词：

D O I：

10.1021/j100118a042

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：

Model zeolite Y-supported Re-Pt catalysts were prepared from zeolite-supported Pt that was prepared from platinum carbonyl clusters. [HRe(CO)5] was added to this zeolite, and the sample was treated in H-2 at different temperatures. The samples were characterized by infrared and X-ray absorption spectroscopies. Re-Pt interactions were significant, as indicated by (1) infrared and EXAFS spectra identified with Re subcarbonyls interacting with Pt clusters following treatment of the sample in H-2 at 185-degrees-C and (2) development of a cluster morphology with Re surrounding Pt clusters in the supercages and present in the Pt-zeolite interface. EXAFS data show that the first-shell Pt-Pt coordination number characterizing the sample treated in H-2 for 0.5 h at 285-degrees-C was 8.2 when the sample contained no Re and was 5.1 when Re was present. Re significantly inhibits Pt cluster agglomeration during the treatment in H-2.

引用

页码：4196 / 4205

页数：10

共 41 条

[1]

Bertolaccini R.J., 1980, CATALYST DEACTIVATIO, P73

[2]

BILOEN P, 1980, J CATAL, V63, P1112

[3]

CHANG J, IN PRESS

[4] MONONUCLEAR RHENIUM CARBONYLS ON MGO - CHARACTERIZATION OF THE METAL SUPPORT INTERFACE BY EXTENDED X-RAY ABSORPTION FINE-STRUCTURE SPECTROSCOPY [J].

CHANG, JR ;

GRON, LU ;

HONJI, A ;

SANCHEZ, KM ;

GATES, BC .

JOURNAL OF PHYSICAL CHEMISTRY, 1991, 95 (24) :9944-9950

[5] SYNTHESIS AND DECARBONYLATION OF PLATINUM CARBONYL CLUSTER ANIONS IN ZEOLITE NAY MADE BASIC BY TREATMENT WITH CSOH [J].

CHANG, JR ;

XU, Z ;

PURNELL, SK ;

GATES, BC .

JOURNAL OF MOLECULAR CATALYSIS, 1993, 80 (01) :49-58

[6]

COLLMAN JP, 1987, PRINCIPLES APPLICATI, P39

[7] CRITERIA FOR AUTOMATIC X-RAY ABSORPTION FINE-STRUCTURE BACKGROUND REMOVAL [J].

COOK, JW ;

SAYERS, DE .

JOURNAL OF APPLIED PHYSICS, 1981, 52 (08) :5024-5031

[8] MOLECULAR AND CRYSTAL STRUCTURE OF OS3(CO)12 [J].

COREY, ER ;

DAHL, LF .

INORGANIC CHEMISTRY, 1962, 1 (03) :521-&

[9] REFORMING-TYPE CATALYSIS WITH ZEOLITE-SUPPORTED PTRE [J].

DOSSI, C ;

TSANG, CM ;

SACHTLER, WMH ;

PSARO, R ;

UGO, R .

ENERGY & FUELS, 1989, 3 (04) :468-474

[10] STRUCTURES OF ALUMINA-SUPPORTED OSMIUM CLUSTERS (HOS3(CO)10(OAL)) AND COMPLEXES (OSII(CO)N=2OR3(OAL)3) DETERMINED BY EXTENDED X-RAY ABSORPTION FINE-STRUCTURE SPECTROSCOPY [J].

DUIVENVOORDEN, FBM ;

KONINGSBERGER, DC ;

UH, YS ;

GATES, BC .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1986, 108 (20) :6254-6262

← 1 2 3 4 5 →