Nanoparticles of Pt hydrosol immobilised on Au support: an approach to the study of structural effects in electrocatalysis

被引：46

作者：

Pron'kin, SN ^{[1
]}

Tsirlina, GA ^{[1
]}

Petrii, OA ^{[1
]}

Vassiliev, SY ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Fac Chem, Dept Electrochem, Moscow 119899, Russia

来源：

ELECTROCHIMICA ACTA | 2001年 / 46卷 / 15期

关键词：

nanoparticles; hydrosol; immobilisation; scanning tunnelling microscopy; electrocatalysis;

D O I：

10.1016/S0013-4686(01)00441-8

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The electrochemical properties of platinum hydrosol. obtained by the reduction of H2PtCl6 by sodium citrate (NaH(2)Cyt), were studied for the first time. Hydrosol particles of mean diameter d(c) approximate to 2.0 nm, as estimated from UV-vis absorbance spectra. were immobilised on a Au support under anodic polarisation to form stable Pt-col/Au electrodes. High Pt coverages were found from a combination of cyclic voltammetry and scanning tunnelling microscopy data. Immobilised Pt particles (most probably. small uniform aggregates) with tl, of about 4.5 nm and a spread of size distribution ca. 1.5 nm demonstrated pronounced adsorption of hydrogen and oxygen similar to pure Pt materials, high electrocatalytic activity with respect to formic acid oxidation as well as a relatively high tolerance towards CO poisoning. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：2343 / 2351

页数：9

共 22 条

[1]

AIKA K, 1976, J RES I CAT HOKKAIDO, V24, P54

[2] IN-SITU STRUCTURAL CHARACTERIZATION OF A PLATINUM ELECTROCATALYST BY DISPERSIVE-X-RAY ABSORPTION-SPECTROSCOPY [J].

ALLEN, PG ;

CONRADSON, SD ;

WILSON, MS ;

GOTTESFELD, S ;

RAISTRICK, ID ;

VALERIO, J ;

LOVATO, M .

ELECTROCHIMICA ACTA, 1994, 39 (16) :2415-2418

[3] ADSORPTIVE AND CATALYTIC PROPERTIES OF PLATINUM MICROCRYSTALS DEPOSITED ON INERT SUPPORTS [J].

BAGOTZKY, VS ;

KANEVSKY, LS ;

PALANKER, VS .

ELECTROCHIMICA ACTA, 1973, 18 (07) :473-483

[4]

BAI JL, 1983, J ELECTROANAL CHEM, V149, P237

[5]

Balaschowa NA, 1937, ACTA PHYSICOCHIM URS, V7, P899

[6]

BRADLEY JS, 1994, CLUSTERS COLLOIDS NY

[7] COLLOIDAL PLATINUM SOLS - PREPARATION, CHARACTERIZATION AND STABILITY TOWARDS SALT [J].

FURLONG, DN ;

LAUNIKONIS, A ;

SASSE, WHF ;

SANDERS, JV .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1984, 80 :571-+

[8] PREPARATION OF ORDERED COLLOID MONOLAYERS BY ELECTROPHORETIC DEPOSITION [J].

GIERSIG, M ;

MULVANEY, P .

LANGMUIR, 1993, 9 (12) :3408-3413

[9] INTERFACIAL ELECTRON-TRANSFER REACTIONS BETWEEN PLATINUM COLLOIDS AND REDUCING RADICALS IN AQUEOUS-SOLUTION [J].

HARRIMAN, A ;

MILLWARD, GR ;

NETA, P ;

RICHOUX, MC ;

THOMAS, JM .

JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (05) :1286-1290

[10] ABSORPTION-SPECTRUM AND SOME CHEMICAL-REACTIONS OF COLLOIDAL PLATINUM IN AQUEOUS-SOLUTION [J].

HENGLEIN, A ;

ERSHOV, BG ;

MALOW, M .

JOURNAL OF PHYSICAL CHEMISTRY, 1995, 99 (38) :14129-14136

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