Adsorption and bonding of 2-butenal on Sn/Pt surface alloys

被引：27
|
作者：
Janin, E [1 ]
von Schenck, H [1 ]
Ringler, S [1 ]
Weissenrieder, J [1 ]
Åkermark, T [1 ]
Göthelid, M [1 ]
机构：
[1] KTH, IMIT, Mat Halvledarfys, S-16440 Kista, Sweden
来源：
JOURNAL OF CATALYSIS | 2003年 / 215卷 / 02期
关键词：
photoelectron spectroscopy; DFT; chemisorption; unsaturated aldehydes; platinum; low-index single-crystal surfaces;
D O I：
10.1016/S0021-9517(03)00016-2
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 adsorption of 2-butenal on the Pt(111), Pt(111)Sn-(2 x 2), and Pt(111)Sn-(root3 x root3)R30degrees surfaces has been studied by high-resolution photoelectron spectroscopy and DFT calculations. On Pt(111) 2-butenal adsorbs at a threefold hollow in a eta(3)(C,C,O) configuration. A similar geometry is observed for Pt(111)Sn-(2 x 2), although the oxygen coordinates to tin instead of platinum. As the surface coverage of tin increases, as for Pt(111)Sn-(root3 x root3)R30degrees, the most stable adsorption geometry changes to eta(1)(O), where the carbonyl oxygen once again coordinates to tin. The carbonyl bond thus retains an activated character as Pt/Sn alloys are formed. The alkene/surface interaction is, however, dramatically influenced at increasing surface concentrations of tin. (C) 2003 Elsevier Science (USA). All rights reserved.
引用
收藏
页码：245 / 253
页数：9
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