Dynamics and spectroscopy of hydrogen atoms on Pd{111}

被引：22

作者：

Fernández-Torres, LC

Sykes, ECH

Nanayakkara, SU

Weiss, PS ^{[1
]}

机构：

[1] Penn State Univ, Dept Chem, Davey Lab 104, University Pk, PA 16802 USA

[2] Penn State Univ, Dept Phys, Davey Lab 104, University Pk, PA 16802 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2006年 / 110卷 / 14期

关键词：

D O I：

10.1021/jp055815e

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：

Chemisorption of hydrogen on Pd{111} is a relatively simple, yet important surface chemical process. By using low-temperature scanning tunneling microscopy, tip-induced motion of adsorbed atomic hydrogen at 4 K has been observed at low coverage. The motion has been ascribed to excitation of vibrational modes that decay into translational modes; vibrational spectroscopy via inelastic electron tunneling corroborates this assignment, and the barrier to hydrogen atom motion has been determined. At higher coverages, tip-induced motion of vacancies in the hydrogen overlayer is observed, and the associated barrier has also been determined.

引用

页码：7380 / 7384

页数：5

共 43 条

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Barnes R. G., 1988, HYDROGEN STORAGE MAT, P350

[2] EVIDENCE FOR SUBSURFACE HYDROGEN ON PD(110) - AN INTERMEDIATE BETWEEN CHEMISORBED AND DISSOLVED SPECIES [J].