THE TEMPERATURE-DEPENDENT EFFECT OF ADSORBATE HINDERED VIBRATIONS ON NEXAFS ANALYSES - NO ON PD(110)

被引：18

作者：

JIGATO, MP ^{[1
]}

WALTER, WK ^{[1
]}

KING, DA ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,DEPT CHEM,CAMBRIDGE CB2 1EW,ENGLAND

来源：

SURFACE SCIENCE | 1994年 / 301卷 / 1-3期

关键词：

D O I：

10.1016/0039-6028(94)91307-2

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 importance of the effect of adsorbate frustrated translational motion on NEXAFS analyses is presented and its temperature dependence is discussed in terms of a harmonic potential model. NO on Pd{110} is studied to show the effect of the frustrated vibration on the determined orientation. The harmonic model agrees with the observed temperature dependence of the NEXAFS data at very low temperatures. In the range above 50 K the results indicate an anharmonic potential, leading the frustrated vibrational mode into a diffusive hopping motion across the surface, at sufficiently high temperatures.

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页码：273 / 284

页数：12

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