Adsorption of CO on Pd/Al2O3/Ta(110) model catalysts

被引：80

作者：

Rainer, DR ^{[1
]}

Wu, MC ^{[1
]}

Mahon, DI ^{[1
]}

Goodman, DW ^{[1
]}

机构：

[1] TEXAS A&M UNIV, DEPT CHEM, COLLEGE STN, TX 77843 USA

来源：

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A | 1996年 / 14卷 / 03期

关键词：

D O I：

10.1116/1.580263

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The adsorption of CO on Pd/Al2O3/Ta(110) model catalysts was studied using infrared reflection adsorption spectroscopy (IRAS) for two different Pd coverages, corresponding to 25-30 and 60-70 Angstrom average particle sizes. Striking similarities between the IRAS data for the larger particles and Pd single crystals indicate that the particles are comprised predominantly of [111] and [100] facets. The isosteric heat of adsorption of CO extrapolated to zero coverage was determined to be 38.9 kcal/mol on the 60-70 Angstrom particles. IRAS and Auger results provide evidence of CO dissociation on the smaller particles. (C) 1996 American Vacuum Society.

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页码：1184 / 1188

页数：5

相关论文

共 19 条

[1] PROPERTIES OF SMALL METAL PARTICLES [J].

BAETZOLD, RC ;

HAMILTON, JF .

PROGRESS IN SOLID STATE CHEMISTRY, 1983, 15 (01) :1-53

[2] X-RAY PHOTOELECTRON-SPECTROSCOPY OF SUPPORTED METAL PARTICLES [J].

BASTL, Z .

VACUUM, 1986, 36 (7-9) :447-448

[3] KINETICS OF CO OXIDATION ON SINGLE-CRYSTAL PD, PT, AND IR [J].

BERLOWITZ, PJ ;

PEDEN, CHF ;

GOODMAN, DW .

JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (18) :5213-5221

[4] CALORIMETRIC HEAT OF ADSORPTION MEASUREMENTS ON PALLADIUM .2. INFLUENCE OF CRYSTALLITE SIZE AND SUPPORT ON CO ADSORPTION [J].

CHOU, P ;

VANNICE, MA .

JOURNAL OF CATALYSIS, 1987, 104 (01) :17-30

[5]

Dicenzo S. B., 1985, Comments on Solid State Physics, V11, P203

[6] DECOMPOSITION OF ETHYLENE ON SMALL PD PARTICLES [J].

DURRER, WG ;

POPPA, H ;

DICKINSON, JT ;

PARK, C .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS, 1985, 3 (03) :1545-1548

[7] SURFACE RESTRUCTURING OF PALLADIUM PARTICLES INDUCED BY CO ADSORPTION [J].

ELYAKHLOUFI, MH ;

GILLET, E .

CATALYSIS LETTERS, 1993, 17 (1-2) :11-20

[8] HYDROGENOLYSIS OF N-BUTANE OVER THE (111) AND (110)-(1X2) SURFACES OF IRIDIUM - A DIRECT CORRELATION BETWEEN CATALYTIC SELECTIVITY AND SURFACE-STRUCTURE [J].

ENGSTROM, JR ;

GOODMAN, DW ;

WEINBERG, WH .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1986, 108 (15) :4653-4655

[9] HYDROGENOLYSIS OF ETHANE, PROPANE, NORMAL-BUTANE, AND NEOPENTANE ON THE (111) AND (110)-(1X2) SURFACES OF IRIDIUM [J].

ENGSTROM, JR ;

GOODMAN, DW ;

WEINBERG, WH .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1988, 110 (25) :8305-8319

[10] CRYSTALLOGRAPHIC STRUCTURE AND CHEMISORPTION ACTIVITY OF PALLADIUM MICA MODEL CATALYSTS .2. TEMPERATURE PROGRAMMED DESORPTION STUDY OF CO CHEMISORPTION ON WELL-DEFINED PALLADIUM PARTICLES [J].

GILLET, E ;

CHANNAKHONE, S ;

MATOLIN, V .

JOURNAL OF CATALYSIS, 1986, 97 (02) :437-447