ASSOCIATIVE VERSUS DISSOCIATIVE ADSORPTION OF WATER ON AL(100)

被引:21
作者
BUSHBY, SJ
CALLEN, BW
GRIFFITHS, K
ESPOSTO, FJ
TIMSIT, RS
NORTON, PR
机构
[1] ALCAN INT LTD,KINGSTON RES & DEV CTR,KINGSTON K7L 5L9,ON,CANADA
[2] UNIV WESTERN ONTARIO,DEPT PHYS,LONDON N6A 5B7,ONTARIO,CANADA
关键词
D O I
10.1016/0039-6028(93)90071-Q
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 adsorption of water on Al(100) at 100 K has been studied using Fourier transform infrared-reflection absorption spectroscopy (FTIR-RAS), nuclear reaction analysis (NRA) and work function measurements (DELTAphi). All results are consistent with molecular adsorption, as no evidence was found for other possible dissociation products such as atomic O or D (H) at this temperature. By condensing alternating layers of D2O and H2O, it was found that a narrow feature in the nu(OD) (nu(OH)) region of the spectrum at 2720 cm-1 (3700 cm-1) is associated with non-hydrogen bonded OD (OH) groups in water molecules existing at the ice-vacuum interface. Surface hydroxyl groups resulting from dissociative adsorption exhibit a broader O-D stretch at 2760 cm-1.
引用
收藏
页码:L181 / L190
页数:10
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