THERMAL FIELD DESORPTION SPECTROSCOPY OF CHEMISORBED HYDROGEN FOR A SINGLE-STEP SITE

被引:11
作者
ERNST, N [1 ]
BLOCK, JH [1 ]
KREUZER, HJ [1 ]
YE, X [1 ]
机构
[1] DALHOUSIE UNIV,DEPT PHYS,HALIFAX B3H 3J5,NS,CANADA
关键词
D O I
10.1103/PhysRevLett.71.891
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The steady state molecular hydrogen ion yield from a single atomic step site of a [110]-oriented tungsten and of a [100]-oriented rhodium crystal is determined as a function of surface temperature using mass and energy resolved probe hole field ion microscopy. A second order kinetic model is developed to fit the experimental data thus obtaining the hydrogen binding energy. For local fields of about 3 V/angstrom the data are close to values obtained from thermal desorption spectroscopy. A comparison is made with calculations of the field-adsorption binding energy of atomic hydrogen on a jellium surface based on density functional theory,
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页码:891 / 894
页数:4
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