TEMPERATURE-DEPENDENCE OF EXAFS SPECTRA OF SUPPORTED SMALL METAL PARTICLES

被引：22

作者：

KURODA, H

YOKOYAMA, T

ASAKURA, K

IWASAWA, Y

机构：

来源：

FARADAY DISCUSSIONS | 1991年 / 92卷

关键词：

D O I：

10.1039/fd9919200189

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：

Temperature dependence of EXAFS was systematically investigated on small metal (Rh or Ru) particles on three different supports, SiO2, NaY zeolite and TiO2. The observed EXAFS oscillations were analysed by the ratio method combined with the cumulant expansion method. The results of these analyses of EXAFS data revealed the existence of a considerable static disorder. It is also shown that the Debye temperature characteristic of particle surface can be determined from analysis of the temperature dependence of the mean-square relative displacement derived from EXAFS. In Rh/TiO2, the surface Debye temperature was found to be ca. 100 K higher in its strong metal-support interaction (SMSI) state in comparison with the normal state, supporting the decoration model for the SMSI state.

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页码：189 / 198

页数：10

相关论文

共 20 条

[1] EXTENDED X-RAY-ABSORPTION FINE-STRUCTURE OF SMALL CU AND NI CLUSTERS - BINDING-ENERGY AND BOND-LENGTH CHANGES WITH CLUSTER SIZE [J].

APAI, G ;

HAMILTON, JF ;

STOHR, J ;

THOMPSON, A .

PHYSICAL REVIEW LETTERS, 1979, 43 (02) :165-169

[2] EXTENDED X-RAY-ABSORPTION FINE-STRUCTURE AND NEAR-EDGE-STRUCTURE STUDIES ON EVAPORATED SMALL CLUSTERS OF AU [J].

BALERNA, A ;

BERNIERI, E ;

PICOZZI, P ;

REALE, A ;

SANTUCCI, S ;

BURATTINI, E ;

MOBILIO, S .

PHYSICAL REVIEW B, 1985, 31 (08) :5058-5065

[3] TEMPERATURE AND POLARIZATION DEPENDENCE OF EXTENDED X-RAY ABSORPTION FINE-STRUCTURE SPECTRA [J].

BENI, G ;

PLATZMAN, PM .

PHYSICAL REVIEW B, 1976, 14 (04) :1514-1518

[4] APPLICATION OF THE RATIO METHOD OF EXAFS ANALYSIS TO DISORDERED-SYSTEMS [J].

BUNKER, G .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH, 1983, 207 (03) :437-444

[5] EFFECT OF PREPARATION METHODS ON THE CATALYTIC PROPERTIES OF ZEOLITE-SUPPORTED RUTHENIUM IN THE FISCHER-TROPSCH SYNTHESIS [J].

CHEN, YW ;

WANG, HT ;

GOODWIN, JG .

JOURNAL OF CATALYSIS, 1983, 83 (02) :415-427

[6] BINDING-ENERGY AND ELECTRONIC-STRUCTURE OF SMALL COPPER PARTICLES [J].

DELLEY, B ;

ELLIS, DE ;

FREEMAN, AJ ;

BAERENDS, EJ ;

POST, D .

PHYSICAL REVIEW B, 1983, 27 (04) :2132-2144

[7] X-RAY-DIFFRACTION STUDY OF FINE GOLD PARTICLES PREPARED BY GAS EVAPORATION TECHNIQUE .1. GENERAL FEATURE [J].

HARADA, J ;

YAO, S ;

ICHIMIYA, A .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1980, 48 (05) :1625-1630

[8] X-RAY-DIFFRACTION STUDY OF FINE GOLD PARTICLES PREPARED BY GAS EVAPORATION TECHNIQUE [J].

HARADA, J ;

OHSHIMA, K .

SURFACE SCIENCE, 1981, 106 (1-3) :51-57

[9] MOLECULAR-ORBITAL STUDY OF STRONG METAL-SUPPORT INTERACTION BETWEEN PLATINUM AND TITANIUM-DIOXIDE [J].

HORSLEY, JA .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1979, 101 (11) :2870-2874

[10] EVIDENCE FOR SLOW UPTAKE OF HYDROGEN BY TITANIA-SUPPORTED METAL SAMPLES - CONSEQUENCES FOR ESTIMATING METALLIC SURFACE-AREAS [J].

JIANG, XZ ;

HAYDEN, TF ;

DUMESIC, JA .

JOURNAL OF CATALYSIS, 1983, 83 (01) :168-181