Pyridine adsorption on the polar ZnO(0001) surface:: Zn termination versus O termination

被引：50

作者：

Hövel, S ^{[1
]}

Kolczewski, C ^{[1
]}

Wühn, M ^{[1
]}

Albers, J ^{[1
]}

Weiss, K ^{[1
]}

Staemmler, V ^{[1
]}

Wöll, C ^{[1
]}

机构：

[1] Ruhr Univ Bochum, D-44780 Bochum, Germany

来源：

JOURNAL OF CHEMICAL PHYSICS | 2000年 / 112卷 / 08期

关键词：

D O I：

10.1063/1.480942

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 interaction of pyridine (C5H5N) with the two differently terminated ZnO(0001) surfaces has been investigated using thermal desorption spectroscopy (TDS), x-ray photoelectron spectroscopy (XPS), and x-ray absorption spectroscopy (NEXAFS). The binding energy of pyridine on the O-terminated ZnO(000-1) surface amounts to 57 kJ/mol and the spectroscopic data reveal only small modifications of the pyridine electronic structure, indicating the presence of a physisorbed species. On the Zn-terminated ZnO(0001) surface, the binding energy is substantially higher, 112 kJ/mol, and the N1s NEXAFS data for the pyridine pi* resonance shows a shift of 0.6 eV toward higher binding energies. This observation indicates a substantial interaction between the nitrogen lone pair and Zn, as is confirmed by precise ab initio calculations of the core-level excitation. (C) 2000 American Institute of Physics. [S0021-9606(00)71106-8].

引用

页码：3909 / 3916

页数：8

共 30 条

[1] COMPARISON OF THE CHEMICAL-PROPERTIES OF THE ZINC-POLAR, THE OXYGEN-POLAR, AND THE NONPOLAR SURFACES OF ZNO [J].