Preparation of Pt-Cu/SiO2 by surface redox reaction

被引：5

作者：

Dumas, JM ^{[1
]}

Rmili, S ^{[1
]}

Barbier, J ^{[1
]}

机构：

[1] Univ Poitiers, Catalyse Chim Organ Lab, UMR 6503, 40 Ave Recteur Pineau, F-86022 Poitiers, France

来源：

JOURNAL DE CHIMIE PHYSIQUE ET DE PHYSICO-CHIMIE BIOLOGIQUE | 1998年 / 95卷 / 07期

关键词：

preparation of bimetallic catalysts; platinum; copper; platinum-copper;

D O I：

10.1051/jcp:1998333

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Pt-Cu/SiO2 bimetallic catalysts were prepared by reduction of cupric ions on Pt by using hydrogen preadsorbed on that metal. According to the overall reaction CU2++ 2Pt-H-ads -> Pt-2-Cu+2H(+) one copper atom is deposited on two accessible Pt atoms. The reaction would occur by two successive steps involving the addition of one hydrogen atom. On well dispersed platinum catalysts deposition of copper occurs by building tridimensional deposits when on large particles copper is deposited as adatoms statistically dispersed on platinum surface.

引用

页码：1650 / 1665

页数：16

共 21 条

[1] Anderson J.R., 1975, Structure of metallic catalysts
[2] STUDY OF ELECTROCHEMICAL GOLD ADSORPTION ON POLYCRYSTALLINE PLATINUM SUBSTRATES
BAKOS, I
SZABO, S
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1993, 344 (1-2): : 303 - 311
[3] COPPER AS A SACRIFICIAL DEPOSIT ON NOBLE METALLIC CATALYSTS
BARBIER, J
DUMAS, JM
GERON, C
HADRANE, H
[J]. APPLIED CATALYSIS, 1990, 67 (01): : L1 - L4
[4] BARBIER J, 1997, HDB HETEROGENEOUS CA
[5] BARBIER J, 1994, APPL CATAL, V179, P116
[6] BODNAR Z, 1991, PREPARATION CATALYST, V5
[7] SITE SEGREGATION IN SMALL RHODIUM BIMETALLIC AGGREGATES - A COMBINED CATALYTIC AND QUANTUM CHEMICAL STUDY
COQ, B
GOURSOT, A
TAZI, T
FIGUERAS, F
SALAHUB, DR
[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1991, 113 (05) : 1485 - 1492
[8] SURFACE-REACTIONS OF HYDROCARBONS AS A PROBE FOR THE CHARACTERIZATION OF RHCU/SIO2 CATALYSTS
COQ, B
DUTARTRE, R
FIGUERAS, F
ROUCO, A
[J]. JOURNAL OF PHYSICAL CHEMISTRY, 1989, 93 (12) : 4904 - 4908
[9] MODIFICATION OF RH/AL2O3 CATALYSTS BY COPPER DEPOSITION AND SULFUR ADSORPTION
DUMAS, JM
GERON, C
HADRANE, H
MARECOT, P
BARBIER, J
[J]. JOURNAL OF MOLECULAR CATALYSIS, 1992, 77 (01): : 87 - 98
[10] HAYWARD DO, 1964, TRAPNELL CHEMISORPTI

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