DIFFUSE-REFLECTANCE IR-SPECTROSCOPY EVIDENCE OF THE UNUSUAL PROPERTIES OF PLATINUM IN PT/MG(AL)O CATALYSTS FOR THE SELECTIVE AROMATIZATION OF N-ALKANES

被引：30

作者：

KAZANSKY, VB ^{[1
]}

BOROVKOV, VY ^{[1
]}

DEROUANE, EG ^{[1
]}

机构：

[1] FAC UNIV NOTRE DAME PAIX,CATALYSE LAB,B-5000 NAMUR,BELGIUM

来源：

CATALYSIS LETTERS | 1993年 / 19卷 / 04期

关键词：

AROMATIZATION OF N-ALKANES; PT/MG(AL)O CATALYST; IR-SPECTROSCOPY;

D O I：

10.1007/BF00767074

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：

Diffuse reflectance IR spectra of CO adsorbed on Pt/Mg(Al)O catalysts were studied at room temperature and different surface coverages of metallic Pt. They show the existence of two types of metallic Pt particles. One type has a normal behavior toward the adsorption of CO, which is probably related to the lower dispersion of Pt. The other type probably corresponds to smaller negatively charged clusters like those found for Pt-loaded alkaline and alkaline-earth forms of zeolites. They are characterized by the very low frequency of the singletone corresponding to the linear form of adsorbed CO and high thermal stability of the bridging complexes of CO with metallic Pt. Such by metal-support interaction modified platinum is likely responsible for high activity and selectivity of Pt/Mg(Al)O catalyst in n-alkanes aromatization.

引用

页码：327 / 331

页数：5

共 15 条

[1] FACTORS DETERMINING CO ADSORPTION SITES ON PD AND PT(100) AND PT(111) SURFACES - THEORETICAL-STUDY [J].

ANDERSON, AB ;

AWAD, MK .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1985, 107 (26) :7854-7857

[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] AROMATIZATION OF N-HEXANE BY PT CLUSTERS SUPPORTED ON HIGH SURFACE-AREA MGO [J].

DAVIS, RJ ;

DEROUANE, EG .

JOURNAL OF CATALYSIS, 1991, 132 (01) :269-274

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

DAVIS, RJ ;

DEROUANE, EG .

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

[6]

DEROUANE EG, 1992, IN PRESS 10TH P INT

[7] INFRARED-SPECTRA OF CO ADSORBED ON PT(100), PT(111), AND PT(110) ELECTRODE SURFACES [J].

KINOMOTO, Y ;

WATANABE, S ;

TAKAHASHI, M ;

ITO, M .

SURFACE SCIENCE, 1991, 242 (1-3) :538-543

[8] IR SPECTROSCOPIC STUDY OF PT/KL ZEOLITES USING ADSORPTION OF CO AS A MOLECULAR PROBE [J].

KUSTOV, LM ;

OSTGARD, D ;

SACHTLER, WMH .

CATALYSIS LETTERS, 1991, 9 (1-2) :121-126

[9] METAL-SUPPORT EFFECTS IN PT/L-ZEOLITE CATALYSTS [J].

LARSEN, G ;

HALLER, GL .

CATALYSIS LETTERS, 1989, 3 (01) :103-110

[10]

OLIVERA PP, 1990, J MOL STRUCT, V210, P393

← 1 2 →