SURFACE-DIFFUSION OF CO ON SILICA-SUPPORTED RU PARTICLES - C-13 NUCLEAR MAGNETIC-RESONANCE STUDIES

被引：14

作者：

DUNCAN, TM ^{[1
]}

THAYER, AM ^{[1
]}

ROOT, TW ^{[1
]}

机构：

[1] UNIV WISCONSIN,MADISON,WI 53706

来源：

JOURNAL OF CHEMICAL PHYSICS | 1990年 / 92卷 / 04期

关键词：

D O I：

10.1063/1.457961

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：

Portions of CO adsorbed on Ru particles, selected by the orientation of the C-O bond relative to an external magnetic field, are labeled by inversion of the 13C nuclear magnetic dipole. Changes in the orientation of the CO bond of these labeled molecules are then observed with 13C NMR spectroscopy. The temperature dependence and rate of reorientation are consistent with surface diffusion on Ru particles with small numbers of flat faces. The insensitivity to CO pressure in the range 0.5-100 Torr discounts stimulated desorption by gas-phase CO. © 1990 American Institute of Physics.

引用

页码：2663 / 2672

页数：10

共 21 条

[1] ON THE NUCLEAR MAGNETIC RESONANCE IN METALS AND ALLOYS [J].