NMR OF PLATINUM CATALYSTS - A TIGHT-BINDING MODEL FOR KNIGHT-SHIFT AND LINE-SHAPE

被引：2

作者：

BIFONE, A

机构：

[1] Scuola Normale Superiore

来源：

SOLID STATE COMMUNICATIONS | 1993年 / 85卷 / 05期

关键词：

D O I：

10.1016/0038-1098(93)90690-O

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A tight-binding approach to the calculation of the local DOS in Platinum metal catalysts is reported. The model takes into account both size and boundary conditions effects. The spatial variation of the Knight-shift inside the clusters and the key features of the NMR spectra for clean and hydrogen covered particles are accounted for. Theoretical results successfully reproduce the narrowing of the experimental spectra after adsorption.

引用

页码：409 / 414

页数：6

共 28 条

[1] SURFACE AND SIZE EFFECTS ON THE ELECTRONIC STATES OF SMALL METALLIC CLUSTERS - A MODEL CALCULATION [J].

BACHELET, GB ;

BASSANI, F ;

BOURG, M ;

JULG, A .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1983, 16 (21) :4305-4320

[2] SIZE EFFECT IN THE OPTICAL-PROPERTIES OF SMALL METALLIC PARTICLES - A SOLVABLE MODEL FOR CUBIC SYMMETRY [J].

BASSANI, F ;

BOURG, M ;

COCCHINI, F .

NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA D-CONDENSED MATTER ATOMIC MOLECULAR AND CHEMICAL PHYSICS FLUIDS PLASMAS BIOPHYSICS, 1985, 5 (05) :419-445

[3] TIGHT-BINDING PARAMETERS FOR CHEMISORPTIVE BONDS OF TRANSITION-METALS WITH HYDROGEN, OXYGEN AND SULFUR [J].

BOUDEVILLE, Y ;

ROUSSEAUVIOLET, J ;

CYROTLACKMANN, F ;

KHANNA, SN .

JOURNAL DE PHYSIQUE, 1983, 44 (03) :433-446

[4] ELECTRONIC-PROPERTIES AND LOCAL-DENSITIES OF STATES IN CLEAN AND HYDROGEN COVERED PT PARTICLES [J].

BUCHER, JP ;

BUTTET, J ;

VANDERKLINK, JJ ;

GRAETZEL, M .

SURFACE SCIENCE, 1989, 214 (03) :347-357

[5] ELECTRONIC-PROPERTIES OF SMALL SUPPORTED PT PARTICLES - NMR-STUDY OF PT-195 HYPERFINE PARAMETERS [J].

BUCHER, JP ;

VANDERKLINK, JJ .

PHYSICAL REVIEW B, 1988, 38 (16) :11038-11047

[6] INTERPRETATION OF KNIGHT SHIFTS + SUSCEPTIBILITIES OF TRANSITION METALS - PLATINUM [J].

CLOGSTON, AM ;

YAFET, Y ;

JACCARINO, V .

PHYSICAL REVIEW, 1964, 134 (3A) :A650-+

[7] The specific temperatures of the electrons of small metal particles at low temperatures [J].

Frohlich, H .

PHYSICA, 1937, 4 :0406-0412

[8]

GREENWOOD NN, 1984, CHEM ELEMENTS

[9] ELECTRON-PHONON INTERACTION - EFFECTS ON THE EXCITATION SPECTRUM OF SOLIDS [J].

IADONISI, G .

RIVISTA DEL NUOVO CIMENTO, 1984, 7 (11) :1-116

[10] NMR OF PLATINUM CATALYSTS - DOUBLE NMR OF CHEMISORBED CARBON-MONOXIDE AND A MODEL FOR THE PLATINUM NMR LINE-SHAPE [J].

MAKOWKA, CD ;

SLICHTER, CP ;

SINFELT, JH .

PHYSICAL REVIEW B, 1985, 31 (09) :5663-5679

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