High temperature growth of Pt on the Rh(111) surface

被引：10
作者：
Duisberg, M
Dräger, M
Wandelt, K
Gruber, ELD
Schmid, M
Varga, P
机构：
[1] Univ Bonn, Inst Phys & Theoret Chem, D-53115 Bonn, Germany
[2] Tech Univ Vienna, Inst Allgemeine Phys, A-1040 Vienna, Austria
来源：
SURFACE SCIENCE | 1999年 / 433卷
基金：
奥地利科学基金会;
关键词：
carbon monoxide; growth; low energy ion scattering; platinum; rhodium; visible and ultraviolet photoelectron spectroscopy;
D O I：
10.1016/S0039-6028(99)00037-0
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 epitaxial growth of Pt on the Rh(111) surface at 700 K was studied with AES, UPS, ISS and STM. From AES and ISS measurements a 2D growth mode is concluded at this substrate temperature. The morphology of the surface is studied by photoemission spectra of adsorbed Xe (PAX) and STM. A disperse distribution of the Pt atoms is suggested by PAX and is consistent with an incorporation of these atoms into the first substrate layer. Atomically and chemically resolved STM measurements confirm these conclusions. The interaction of CO with the surface alloy is investigated by UPS. The GO-induced features in UP spectra show significant differences in the peak positions and shape between the clean substrate and the surface precovered with different amounts of Pt. The CO induced emissions are, thus, used for a quantitative titration of Pt on the Rh surface. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：554 / 558
页数：5
相关论文
共 18 条
[1]   ADSORBED LAYER AND THIN-FILM GROWTH MODES MONITORED BY AUGER-ELECTRON SPECTROSCOPY [J].
ARGILE, C ;
RHEAD, GE .
SURFACE SCIENCE REPORTS, 1989, 10 (6-7) :277-356
[2]   SURFACE ENRICHMENT OF PT10RH90(111) .1. ANNEALING IN VACUUM AND LOW-PRESSURE ENVIRONMENTS [J].
BECK, DD ;
DIMAGGIO, CL ;
FISHER, GB .
SURFACE SCIENCE, 1993, 297 (03) :293-302
[3]   On the adsorption sites for CO on the Rh(111) single crystal surface [J].
Beutler, A ;
Lundgren, E ;
Nyholm, R ;
Andersen, JN ;
Setlik, B ;
Heskett, D .
SURFACE SCIENCE, 1997, 371 (2-3) :381-389
[4]   MECHANISM OF THE CONVERSION OF ETHENE TO ETHYLIDYNE ON RHODIUM(111) - EVIDENCE FOR A VINYLIC INTERMEDIATE [J].
BORG, HJ ;
VANHARDEVELD, RM ;
NIEMANTSVERDRIET, JWH .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1995, 91 (20) :3679-3684
[5]  
DAISER SM, 1984, THESIS U MUNCHEN
[6]   Absolute composition depth-profiles in surface segregation of Pt-Rh alloys [J].
Florencio, J ;
Ren, DM ;
Tsong, TT .
SURFACE SCIENCE, 1996, 345 (03) :L29-L33
[7]   Scanning tunneling microscopy of binary-alloy surfaces: is chemical contrast a consequence of alloying? [J].
Hofer, WA ;
Ritz, G ;
Hebenstreit, W ;
Schmid, M ;
Varga, P ;
Redinger, J .
SURFACE SCIENCE, 1998, 405 (2-3) :L514-L519
[8]  
KANDLER J, 1997, THESIS U BONN
[9]  
RITZ G, 1997, THESIS VIENNA U TECH
[10]   Interaction of carbon monoxide with a platinum(0.25)-rhodium(0.75)(111) single crystal surface [J].
Rutten, FJM ;
Nieuwenhuys, BE ;
McCoustra, MRS ;
Chesters, MA ;
Hollins, P .
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, 1997, 15 (03) :1619-1623
12