Molecular beam study of CH4 oxidation on a Pt(111)-(2x2)-O surface

被引：21

作者：

Kondo, T ^{[1
]}

Sasaki, T

Yamamoto, S

机构：

[1] Univ Tsukuba, Inst Appl Phys, Tsukuba, Ibaraki 3058573, Japan

[2] Univ Tsukuba, Ctr Tsukuba Adv Res Alliance, Tsukuba, Ibaraki 3058573, Japan

来源：

JOURNAL OF CHEMICAL PHYSICS | 2003年 / 118卷 / 02期

关键词：

D O I：

10.1063/1.1527894

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 interaction of CH4 with a Pt(111)-(2x2)-O surface has been investigated by a supersonic molecular beam scattering technique. CH4 irradiation is found to completely remove oxygen atoms from the surface via CH4 oxidation reaction, CH4+O-->CO+H-2. The reaction is found to be translationally activated. The oxidation probability of CH4 on Pt(111)-(2x2)-O is found roughly an order of magnitude greater than the initial dissociative chemisorption probability of CH4 on Pt(111), especially under a low incident kinetic energy condition. From the angular intensity distribution and the time-of-flight distribution measurements of scattered CH4, no significant difference in the collision dynamics of CH4 both on Pt(111) and on Pt(111)-(2x2)-O is recognized. (C) 2003 American Institute of Physics.

引用

页码：760 / 767

页数：8

共 40 条

[1] DISSOCIATIVE CHEMISORPTION OF CH4 ON NI(100) WITH PREADSORBED OXYGEN [J].

ALSTRUP, I ;

CHORKENDORFF, I ;

ULLMANN, S .

SURFACE SCIENCE, 1990, 234 (1-2) :79-86

[2] THE INTERACTION OF CH4 AT HIGH-TEMPERATURES WITH CLEAN AND OXYGEN PRECOVERED CU(100) [J].

ALSTRUP, I ;

CHORKENDORFF, I ;

ULLMANN, S .

SURFACE SCIENCE, 1992, 264 (1-2) :95-102

[3] DYNAMICS OF MOLECULAR CH4 ADSORPTION ON PT(111) [J].

ARUMAINAYAGAM, CR ;

MCMASTER, MC ;

SCHOOFS, GR ;

MADIX, RJ .

SURFACE SCIENCE, 1989, 222 (01) :213-246

[4] Chemisorption of methane on Ni(100) and Ni(111) surfaces with preadsorbed potassium [J].

Bengaard, HS ;

Alstrup, I ;

Chorkendorff, I ;

Ullmann, S ;

Rostrup-Nielsen, JR ;

Norskov, JK .

JOURNAL OF CATALYSIS, 1999, 187 (01) :238-244

[5] Design of a surface alloy catalyst for steam reforming [J].

Besenbacher, F ;

Chorkendorff, I ;

Clausen, BS ;

Hammer, B ;

Molenbroek, AM ;

Norskov, JK ;

Stensgaard, I .

SCIENCE, 1998, 279 (5358) :1913-1915

[6] Atomic beam diffraction from solid surfaces [J].

Farías, D ;

Rieder, KH .

REPORTS ON PROGRESS IN PHYSICS, 1998, 61 (12) :1575-1664

[7] OXYGEN INTERACTIONS WITH THE PT(111) SURFACE [J].

GLAND, JL ;

SEXTON, BA ;

FISHER, GB .

SURFACE SCIENCE, 1980, 95 (2-3) :587-602

[8] SYNTHESIS GAS-FORMATION BY DIRECT OXIDATION OF METHANE OVER PT MONOLITHS [J].

HICKMAN, DA ;

SCHMIDT, LD .

JOURNAL OF CATALYSIS, 1992, 138 (01) :267-282

[9] PRODUCTION OF SYNGAS BY DIRECT CATALYTIC-OXIDATION OF METHANE [J].

HICKMAN, DA ;

SCHMIDT, LD .

SCIENCE, 1993, 259 (5093) :343-346

[10] Molecular beam time of flight analysis of the reaction dynamics of alkane molecules interacting with a Pt(111) surface [J].

Hiraoka, T ;

Yagyu, S ;

Kondo, T ;

Ikeuchi, T ;

Yamamoto, S .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 2000, 39 (2A) :612-615

← 1 2 3 4 →