RESONANCE ELECTRON-SCATTERING BY PHYSISORBED AND CHEMISORBED O-2 ON PT(111)

被引：23

作者：

SILLER, L ^{[1
]}

WENDELKEN, JF ^{[1
]}

HOCK, KM ^{[1
]}

PALMER, RE ^{[1
]}

机构：

[1] OAK RIDGE NATL LAB, DIV SOLID STATE, OAK RIDGE, TN 37831 USA

来源：

CHEMICAL PHYSICS LETTERS | 1993年 / 210卷 / 1-3期

关键词：

D O I：

10.1016/0009-2614(93)89092-V

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：

We have investigated resonance electron scattering by both physisorbed and chemisorbed molecular O2 on Pt(111). In each case, the molecular sigma*-shape resonance is manifest in the vibrational excitation cross section but the resonance energy is lowered in comparison with the free molecule. We attribute the shift in energy (2.25 eV) in the physisorbed molecule primarily to an image potential effect. We identify the increased bond length of the chemisorbed molecule as an important factor in the larger shift (5.75 eV) observed in this case. This conclusion is supported by a consideration of data for adsorbed molecules containing the CO group.

引用

页码：15 / 20

页数：6

共 45 条

[1] ELECTRIC-FIELD AND AG(001) SURFACE ELECTRONIC-STRUCTURE [J].

AERS, GC ;

INGLESFIELD, JE .

SURFACE SCIENCE, 1989, 217 (1-2) :367-383

[2]

[Anonymous], 1992, NEXAFS SPECTROSCOPY, DOI DOI 10.1007/978-3-662-02853-7

[3] SELECTIVE RESONANCE POPULATION IN EELS OF PHYSISORBED O2 [J].

BARNARD, JC ;

PALMER, RE .

SURFACE SCIENCE, 1992, 269 :420-424

[4] GROUND-STATE OF THE ELECTRON-GAS BY A STOCHASTIC METHOD [J].

CEPERLEY, DM ;

ALDER, BJ .

PHYSICAL REVIEW LETTERS, 1980, 45 (07) :566-569

[5] 1ST-PRINCIPLES CALCULATIONS OF MANY-BODY BAND-GAP NARROWING AT AN AL/GAAS(110) INTERFACE [J].

CHARLESWORTH, JPA ;

GODBY, RW ;

NEEDS, RJ .

PHYSICAL REVIEW LETTERS, 1993, 70 (11) :1685-1688

[6] LAYER-RESOLVED SHIFTS OF PHOTOEMISSION AND AUGER-SPECTRA FROM PHYSISORBED RARE-GAS MULTILAYERS [J].

CHIANG, TC ;

KAINDL, G ;

MANDEL, T .

PHYSICAL REVIEW B, 1986, 33 (02) :695-711

[7] RESONANCE SCATTERING OF ELECTRONS FROM N-2, CO, O-2, AND H-2 ADSORBED ON A SILVER SURFACE [J].

DEMUTH, JE ;

SCHMEISSER, D ;

AVOURIS, P .

PHYSICAL REVIEW LETTERS, 1981, 47 (16) :1166-1169

[8] TOTAL ELASTIC ELECTRON-SCATTERING CROSS-SECTION FOR N2 BETWEEN 0 AND 1000 EV [J].

DILL, D ;

DEHMER, JL .

PHYSICAL REVIEW A, 1977, 16 (04) :1423-1431

[9] ELECTRON-MOLECULE SCATTERING AND MOLECULAR PHOTOIONIZATION USING MULTIPLE-SCATTERING METHOD [J].

DILL, D ;

DEHMER, JL .

JOURNAL OF CHEMICAL PHYSICS, 1974, 61 (02) :692-699

[10] SPECTROSCOPIC STUDIES OF MOLECULAR-OXYGEN ADSORBED ON PT(111) [J].

FISHER, GB ;

SEXTON, BA ;

GLAND, JL .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY, 1980, 17 (01) :144-144

← 1 2 3 4 5 →