THE SURFACE-STRUCTURE AND COMPOSITION OF THE LOW INDEX SINGLE-CRYSTAL FACES OF THE ORDERED ALLOY PT3SN

被引：40

作者：

HANER, AN ^{[1
]}

ROSS, PN ^{[1
]}

BARDI, U ^{[1
]}

机构：

[1] UNIV FLORENCE,DEPT CHEM,I-50121 FLORENCE,ITALY

来源：

CATALYSIS LETTERS | 1991年 / 8卷 / 01期

关键词：

PLATINUM-TIN ALLOY; LOW ENERGY ION-SCATTERING (LEISS) FROM; LOW ENERGY ELECTRON DIFFRACTION (LEED) FROM;

D O I：

10.1007/BF00764376

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 surface composition and structure of [111], [100], and [110] oriented single crystals of the ordered alloy Pt3Sn (Ll2 or Cu3Au-type) were determined using the combination of low energy electron diffraction (LEED) and low energy ion scattering spectroscopy (LEISS). The clean annealed surfaces displayed LEED patterns and Sn/Pt LEISS intensity ratios consistent with the surface structures expected for bulk termination. In the case of the [100] and [110] crystals, preferential termination in the mixed (50% Sn) layer was indicated, suggesting this termination to be the consequence of a thermodynamic preference for tin to be at the surface.

引用

页码：1 / 7

页数：7

共 22 条

[1]

BARDI U, 1984, SURF SCI, V146, pL555, DOI 10.1016/0039-6028(84)90220-6

[2] SURFACE-COMPOSITION OF SOME SELECTED GROUP-VIII AU AND GROUP-VIII SN ALLOYS [J].