Particle size effects in the acetylene cyclotrimerization on planar model Al2O3 thin film supported Pd clusters

被引：39

作者：

Holmblad, PM ^{[1
]}

Rainer, DR ^{[1
]}

Goodman, DW ^{[1
]}

机构：

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

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 1997年 / 101卷 / 44期

关键词：

D O I：

10.1021/jp971318p

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 low-temperature cyclotrimerization of acetylene to benzene on alumina thin film supported Pd particles of controlled size has been studied by temperature-programmed desorption. The reactively formed benzene is observed to desorb in three distinctly separate features with kinetics resembling those observed for acetylene cyclotrimerization on Pd single crystals. An enhanced activity for low-temperature benzene desorption is observed for the larger Pd particles, consistent with single-crystal results that reveal that the Pd(111) surface favors low-temperature desorption of the reactively formed benzene relative to more open surfaces. Additionally, a pronounced drop-off in benzene production is observed for the smallest particles studied, suggestive of an ensemble size requirement for the reaction.

引用

收藏

页码：8883 / 8886

页数：4

相关论文

共 27 条

[1] SURFACE-STRUCTURE AND REACTIVITY IN THE CYCLIZATION OF ACETYLENE TO BENZENE WITH PD OVERLAYERS AND PD/AU SURFACE ALLOYS ON AU(111) [J].

BADDELEY, CJ ;

ORMEROD, RM ;

STEPHENSON, AW ;

LAMBERT, RM .

JOURNAL OF PHYSICAL CHEMISTRY, 1995, 99 (14) :5146-5151

[2] Ensemble effects in the coupling of acetylene to benzene on a bimetallic surface: A study with Pd{111}/Au [J].

Baddeley, CJ ;

Tikhov, M ;

Hardacre, C ;

Lomas, JR ;

Lambert, RM .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (06) :2189-2194

[3] SURFACE VIBRATIONAL SPECTROSCOPY WITH ANGLE-DEPENDENT ELECTRON-ENERGY LOSS SPECTROSCOPY - ACETYLENE CHEMISORPTION ON PD(111) [J].

GATES, JA ;

KESMODEL, LL .

JOURNAL OF CHEMICAL PHYSICS, 1982, 76 (08) :4281-4286

[4] THERMAL EVOLUTION OF ACETYLENE AND ETHYLENE ON PD(111) [J].

GATES, JA ;

KESMODEL, LL .

SURFACE SCIENCE, 1983, 124 (01) :68-86

[5] HETEROCYCLIZATION REACTION SITES ON THE SULFIDED PD(111) SURFACE [J].

GELLMAN, AJ .

LANGMUIR, 1991, 7 (05) :827-830

[6] ACETYLENE, ETHYLENE, AND ARENE CHEMISTRY OF PALLADIUM SURFACES [J].

GENTLE, TM ;

MUETTERTIES, EL .

JOURNAL OF PHYSICAL CHEMISTRY, 1983, 87 (14) :2469-2472

[7] A NEAR-EDGE X-RAY ABSORPTION FINE-STRUCTURE AND PHOTOELECTRON SPECTROSCOPIC STUDY OF THE STRUCTURE OF ACETYLENE ON PD(111) AT LOW-TEMPERATURE [J].

HOFFMANN, H ;

ZAERA, F ;

ORMEROD, RM ;

LAMBERT, RM ;

YAO, JM ;

SALDIN, DK ;

WANG, LP ;

BENNETT, DW ;

TYSOE, WT .

SURFACE SCIENCE, 1992, 268 (1-3) :1-10

[8] VIBRATIONAL SPECTROSCOPY OF ACETYLENE DECOMPOSITION ON PALLADIUM(111) AND PALLADIUM(100) SURFACES [J].

KESMODEL, LL ;

WADDILL, GD ;

GATES, JA .

SURFACE SCIENCE, 1984, 138 (2-3) :464-474

[9] STRUCTURAL AND CATALYTIC PROPERTIES OF NOVEL AU/PD BIMETALLIC COLLOID PARTICLES - EXAFS, XRD, AND ACETYLENE COUPLING [J].

LEE, AF ;

BADDELEY, CJ ;

HARDACRE, C ;

ORMEROD, RM ;

LAMBERT, RM ;

SCHMID, G ;

WEST, H .

JOURNAL OF PHYSICAL CHEMISTRY, 1995, 99 (16) :6096-6102

[10] HREELS STUDY OF THE CYCLOMERIZATION OF ACETYLENE ON CLEAN AND PHOSPHORUS-COVERED PALLADIUM (111) SURFACES [J].

MARCHON, B .

SURFACE SCIENCE, 1985, 162 (1-3) :382-387