CARBON-MONOXIDE ADSORPTION ON A PT80FE20(111) SINGLE-CRYSTAL ALLOY

被引：22

作者：

ATLI, A

ABON, M

BECCAT, P

BERTOLINI, JC

TARDY, B

机构：

[1] Institut de Recherches sur la Catalyse, CNRS, 69626 VilleurbanneCedex

来源：

SURFACE SCIENCE | 1994年 / 302卷 / 1-2期

关键词：

D O I：

10.1016/0039-6028(94)91102-9

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：

It has been previously shown that the topmost layer of the Pt80Fe20(111) single-crystal alloy is characterized by a large Pt surface segregation and two types of Pt atoms. Carbon monoxide adsorption has been studied on that surface by TDS, HREELS and work-function changes at 120 K. HREELS indicates that on-top CO is the prevalent adsorbed species, although bridge-bonded CO is also present near saturation. The general shape of work-function changes exhibits a similar behaviour on the alloy and on Pt(lll). TDS spectra show two main peaks which have been related to the two kinds of surface Pt atoms. It is proposed that the presence of iron atoms in the subsurface induces the observed decrease in the CO binding energy.

引用

收藏

页码：121 / 125

页数：5

相关论文

共 17 条

[1] CARBON-MONOXIDE ADSORPTION ON A CLEAN OR SULFUR COVERED PLATINUM (III) FACE [J].

ABON, M ;

BILLY, J .

JOURNAL DE CHIMIE PHYSIQUE ET DE PHYSICO-CHIMIE BIOLOGIQUE, 1985, 82 (01) :59-65

[2] HYDROGEN CHEMISORPTION ON PT-80 FE-20(111) STUDIED BY TDS AND UPS [J].

ATLI, A ;

ALNOT, M ;

EHRHARDT, JJ ;

BERTOLINI, JC ;

ABON, M .

SURFACE SCIENCE, 1992, 269 :365-371

[3] ELECTRON-ENERGY LOSS SPECTROSCOPIC STUDY OF CO ON PT(111) [J].

AVERY, NR .

JOURNAL OF CHEMICAL PHYSICS, 1981, 74 (07) :4202-4203

[4] BULK AND SURFACE CORE LEVEL BINDING-ENERGIES IN THE PT80FE20(111) ALLOY [J].

BARRETT, N ;

GUILLOT, C ;

BERTOLINI, JC ;

MASSARDIER, J ;

KHANRA, BC .

SURFACE SCIENCE, 1992, 260 (1-3) :L11-L16

[5] MONOTONOUS CONCENTRATION PROFILE AND RECONSTRUCTION AT PT80FE20(111) - LEED STUDY OF A CATALYST [J].

BECCAT, P ;

GAUTHIER, Y ;

BAUDOINGSAVOIS, R ;

BERTOLINI, JC .

SURFACE SCIENCE, 1990, 238 (1-3) :105-118

[6] CROTONALDEHYDE AND METHYLCROTONALDEHYDE HYDROGENATION OVER PT(111) AND PT80FE20(111) SINGLE-CRYSTALS [J].

BECCAT, P ;

BERTOLINI, JC ;

GAUTHIER, Y ;

MASSARDIER, J ;

RUIZ, P .

JOURNAL OF CATALYSIS, 1990, 126 (02) :451-456

[7] VIBRATIONAL EELS STUDIES OF CO CHEMISORPTION ON CLEAN AND CARBIDED (111), (100) AND (110) NICKEL SURFACES [J].

BERTOLINI, JC ;

TARDY, B .

SURFACE SCIENCE, 1981, 102 (01) :131-150

[8] ON THE SPECIFIC REACTIVITY OF PLATINUM SEGREGATED LAYERS ON PT80X20 (111) (X = NI, CO, FE) ALLOYS [J].

BERTOLINI, JC ;

MASSARDIER, J .

CATALYSIS LETTERS, 1991, 9 (3-4) :183-188

[9] SURFACE REACTIVITY OF PLATINUM NICKEL SINGLE-CRYSTAL ALLOYS - CARBON-MONOXIDE ADSORPTION [J].

BERTOLINI, JC ;

TARDY, B ;

ABON, M ;

BILLY, J ;

DELICHERE, P ;

MASSARDIER, J .

SURFACE SCIENCE, 1983, 135 (1-3) :117-127

[10] CHEMISORPTION OF CO ON PT(111) SURFACE [J].

ERTL, G ;

NEUMANN, M ;

STREIT, KM .

SURFACE SCIENCE, 1977, 64 (02) :393-410