Chemisorption of hydrogen on the missing-row Pt(110)-(1 x 2) surface

被引：23

作者：

Minca, M.

Penner, S.

Loerting, T.

Menzel, A. ^{[1
]}

Bertel, E.

Zucca, R.

Redinger, J.

机构：

[1] Univ Innsbruck, Inst Phys Chem, A-6020 Innsbruck, Austria

[2] Vienna Univ Technol, Ctr Computat Mat Sci, A-1060 Vienna, Austria

来源：

TOPICS IN CATALYSIS | 2007年 / 46卷 / 1-2期

基金：

奥地利科学基金会;

关键词：

hydrogen chemisorption; transition metal surfaces; surface reconstruction; surface relaxation; desorption;

D O I：

10.1007/s11244-007-0326-4

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Chemisorption of hydrogen on the missing-row reconstructed Pt(110)-(1 x 2) surface has been studied by TPD, quantitative LEED, and DFT calculations. An (atypical) chemisorption site on the outermost close-packed rows with an ideal coverage of 0.5 ML (beta(2)-state) is found. Adsorption sites on the (111) microfacets are occupied only at higher coverage (beta(1)-state). After exposures of more than 400 L, the TPD spectra clearly reveal the controversly discussed alpha-state. In the same coverage range, an intense 1 x 4 superstructure becomes visible at LEED energies around 50 eV. The saturation coverage for chemisorption at T = 120 K is 33% higher than assumed previously.

引用

页码：161 / 167

页数：7

共 25 条

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