STUDIES OF THE SEGREGATION DEPENDENCE OF PROTON KNIGHT-SHIFTS IN RU-CU BIMETALLICS

被引：6

作者：

KHANRA, BC

KING, TS

机构：

[1] US DOE,AMES LAB,AMES,IA 50011

[2] IOWA STATE UNIV SCI & TECHNOL,DEPT CHEM ENGN,AMES,IA 50011

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1993年 / 97卷 / 16期

关键词：

D O I：

10.1021/j100118a036

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 concentration dependence of proton Knight shifts associated with chemisorbed hydrogen on Ru-Cu bimetallics has been studied in terms of conduction electron polarization and surface segregation. Comparison of the calculated results with the experimental results suggests that the proton Knight shift for Ru-Cu particles results mainly from the hydrogen atoms experiencing a hyperfine interaction with three Ru first nearest neighbors.

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页码：4164 / 4166

页数：3

相关论文

共 13 条

[1] THEORETICAL-STUDY OF HYDROGEN ADSORPTION ON RU(0001) - POSSIBLE SURFACE AND SUBSURFACE OCCUPATION SITES [J].

CHOU, MY ;

CHELIKOWSKY, JR .

PHYSICAL REVIEW B, 1989, 39 (09) :5623-5631

[2] 1ST-PRINCIPLES STUDY OF HYDROGEN ADSORPTION ON RU(0001) - POSSIBLE OCCUPATION OF SUBSURFACE SITES [J].

CHOU, MY ;

CHELIKOWSKY, JR .

PHYSICAL REVIEW LETTERS, 1987, 59 (15) :1737-1740

[3] LONG-RANGE CONDUCTION-ELECTRON POLARIZATION IN PD-BASED FE-PD ALLOYS [J].

CRAIG, PP ;

MOZER, B ;

SEGNAN, R .

PHYSICAL REVIEW LETTERS, 1965, 14 (22) :895-&

[4]

Guggenheim E A, 1952, MIXTURES, P38

[5]

HELMS CR, 1979, INTERFACIAL SEGREGAT, P175

[6] AN EXTENDED HUCKEL STUDY OF HYDROGEN AND OXYGEN-CHEMISORPTION ON RU(001) SURFACE [J].

KHANRA, BC ;

SAHA, SK .

CHEMICAL PHYSICS, 1983, 76 (02) :255-258

[7] THE ADSORPTION OF HYDROGEN ON A RUTHENIUM (1010) SURFACE [J].

LAUTH, G ;

SCHWARZ, E ;

CHRISTMANN, K .

JOURNAL OF CHEMICAL PHYSICS, 1989, 91 (06) :3729-3743

[8] KNIGHT-SHIFT OF H ADATOMS ON CU1-XNIX ALLOY [J].

MODAK, S ;

KHANRA, BC .

PHYSICAL REVIEW B, 1983, 28 (04) :2279-2280

[9] ON THE NMR-STUDY OF HYDROGEN ADSORBED ON CU-NI ALLOYS [J].

MODAK, S ;

KHANRA, BC .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1985, 18 (27) :L897-L899

[10] CHARACTERIZATION OF SILICA-SUPPORTED RU-AG AND RU-AU BIMETALLIC CATALYSTS BY HYDROGEN CHEMISORPTION AND NMR OF ADSORBED HYDROGEN [J].

WU, X ;

GERSTEIN, BC ;

KING, TS .

JOURNAL OF CATALYSIS, 1990, 123 (01) :43-59