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ADSORPTION OF HYDROGEN ON AL(111) AND AL(110) - COVERAGE AND TEMPERATURE-DEPENDENCE OF ADSORPTION STATES

被引：19
作者：
KONDOH, H
HARA, M
DOMEN, K
NOZOYE, H
机构：
[1] NATL CHEM LAB IND,1-1 HIGASHI,TSUKUBA,IBARAKI 305,JAPAN
[2] TOKYO INST TECHNOL,RESOURCES UTILIZAT RES LAB,YOKOHAMA,KANAGAWA 227,JAPAN
来源：
SURFACE SCIENCE | 1993年 / 287卷
关键词：
D O I：
10.1016/0039-6028(93)90745-6
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：
Although hydrogen adsorbed on aluminum surfaces is a simple-looking adsorption system, the interaction between them has been found to be very peculiar; that is, a large amount of aluminum hydride molecules such as Al2H6 and/or AlH3 desorb from H/Al(lll), while they desorb hardly from H/Al(110). In order to investigate the adsorption states of hydrogen on the two different aluminum surfaces, we have studied these systems by TPD, LEED, and HREELS. Hydrogen atoms adsorb in the island-growth manner on Al(111) at 85 K from the initial stage of adsorption and form a surface aluminum hydride after annealing the surface. The hydrogen adsorption on Al(110) at 85 K exhibits sequential site filling in contrast to H/Al(111) and displays a (1 X 2) reconstruction after annealing.
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页码：74 / 78
页数：5
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