IN-SITU EXAFS INVESTIGATION OF NONACIDIC CVD-BASED PT/KL CATALYST UNDER OXIDATION-REDUCTION CYCLES

被引：15

作者：

BELLATRECCIA, M

ZANONI, R

DOSSI, C

PSARO, R

RECCHIA, S

VLAIC, G

机构：

[1] UNIV MILAN,DIPARTIMENTO CHIM INORGAN MET ORGAN & ANALIT,MILAN,ITALY

[2] UNIV MILAN,CTR CNR,MILAN,ITALY

[3] SINCROTRONE TRIESTE,I-34012 TRIESTE,ITALY

[4] UNIV TRIESTE,DIPARTIMENTO SCI CHIM,TRIESTE,ITALY

来源：

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1995年 / 91卷 / 13期

关键词：

D O I：

10.1039/ft9959102045

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：

The structural evolution of non-acidic chemical-vapour deposition (CVD)-based Pt/KL catalyst has been investigated by in-situ extended X-ray absorption fine structure (EXAFS) spectroscopy. After in-situ reduction (H-2, 400 degrees C), EXAFS results suggested the presence of small metal particles which may be localized inside the KL-zeolite channels. After the reforming of methylcyclopentane at 500 degrees C (and 1 atm), no coke deposition was evidenced by EXAFS, in agreement with the non-acidic character of this catalyst. Severe O2H2 regeneration cycles did not alter the structure and location of Pt particles inside the zeolite.

引用

收藏

页码：2045 / 2049

页数：5

相关论文

共 32 条

[1] CRYSTAL STRUCTURE OF SYNTHETIC ZEOLITE L [J].

BARRER, RM ;

VILLIGER, H .

ZEITSCHRIFT FUR KRISTALLOGRAPHIE KRISTALLGEOMETRIE KRISTALLPHYSIK KRISTALLCHEMIE, 1969, 128 (3-6) :352-&

[2]

BERNARD JR, 1980, 5TH P INT C ZEOL NAP, P686

[3] PLATINUM-ZEOLITE INTERACTIONS IN ALKALINE L-ZEOLITES - CORRELATIONS BETWEEN CATALYTIC ACTIVITY AND PLATINUM STATE [J].

BESOUKHANOVA, C ;

GUIDOT, J ;

BARTHOMEUF, D ;

BREYSSE, M ;

BERNARD, JR .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1981, 77 :1595-1604

[4] RING ENLARGEMENT AND RING-OPENING OVER MONOFUNCTIONAL AND BIFUNCTIONAL CATALYSTS [J].

CHOW, M ;

PARK, SH ;

SACHTLER, WMH .

APPLIED CATALYSIS, 1985, 19 (02) :349-364

[5] A NEW PROCEDURE FOR PARTICLE-SIZE DETERMINATION BY EXAFS BASED ON MOLECULAR-DYNAMICS SIMULATIONS [J].

CLAUSEN, BS ;

GRABAEK, L ;

TOPSOE, H ;

HANSEN, LB ;

STOLTZE, P ;

NORSKOV, JK ;

NIELSEN, OH .

JOURNAL OF CATALYSIS, 1993, 141 (02) :368-379

[6]

DAVIS RJ, 1994, HETEROGEN CHEM REV, V1, P41

[7] A NONPOROUS SUPPORTED-PLATINUM CATALYST FOR AROMATIZATION OF N-HEXANE [J].

DAVIS, RJ ;

DEROUANE, EG .

NATURE, 1991, 349 (6307) :313-315

[8] STRUCTURAL RECOGNITION AND PREORGANIZATION IN ZEOLITE CATALYSIS - DIRECT AROMATIZATION OF NORMAL-HEXANE ON ZEOLITE L-BASED CATALYSTS [J].

DEROUANE, EG ;

VANDERVEKEN, DJ .

APPLIED CATALYSIS, 1988, 45 (01) :L15-L22

[9] CHEMICAL-VAPOR-DEPOSITION OF PLATINUM HEXAFLUOROACETYLACETONATE INSIDE KL ZEOLITE - A NEW ROUTE TO NONACIDIC PLATINUM-IN-ZEOLITE CATALYSTS [J].

DOSSI, C ;

PSARO, R ;

BARTSCH, A ;

FUSI, A ;

SORDELLI, L ;

UGO, R ;

BELLATRECCIA, M ;

ZANONI, R ;

VLAIC, G .

JOURNAL OF CATALYSIS, 1994, 145 (02) :377-383

[10] ORGANOMETALLICS-CHEMICAL VAPOR-DEPOSITION - A NEW TECHNIQUE FOR THE PREPARATION OF NONACIDIC, ZEOLITE-SUPPORTED PD AND PT CATALYSTS [J].

DOSSI, C ;

PSARO, R ;

BARTSCH, A ;

BRIVIO, E ;

GALASCO, A ;

LOSI, P .

CATALYSIS TODAY, 1993, 17 (03) :527-535

← 1 2 3 4 →