Preparation and characterization of silane-stabilized, highly uniform, nanobimetallic Pt-Pd particles in solid and liquid matrixes

被引：38

作者：

D'Souza, L ^{[1
]}

Sampath, S ^{[1
]}

机构：

[1] Indian Inst Sci, Dept Inorgan & Phys Chem, Bangalore 560012, Karnataka, India

来源：

LANGMUIR | 2000年 / 16卷 / 22期

关键词：

D O I：

10.1021/la000496y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Highly uniform, stable nanobimetallic dispersions are prepared in a single si ep in the form of sols, gels, and monoliths, using organically modified silicates as the matrix and the stabilizer. The Pt-Pd bimetallic dispersions are characterized by W-vis, TEM, SEM, and XRD measurements. The evolution of silicate was followed by IR spectroscopy. XPS and CO adsorption studies reveal that the structure of the particles consists of a palladium core and a platinum shell. Electrocatalysis of ascorbic acid oxidation has been demonstrated using thin films of silicate containing the nanobimetal particles on a glassy carbon electrode.

引用

页码：8510 / 8517

页数：8

共 56 条

[1]

[Anonymous], SURFACE SCI REPORTS

[2] ELECTROCHEMICAL INVESTIGATION OF A STRUCTURE SENSITIVE GROWTH MODE - PALLADIUM DEPOSITION ON PT(100)-HEX-R0.7-DEGREES AND PT(100)-(1X1) [J].

ATTARD, GA ;

PRICE, R .

SURFACE SCIENCE, 1995, 335 (1-3) :63-74

[3] Direct synthesis and characterization of gold and other noble metal nanodispersions in sol-gel-derived organically modified silicates [J].

Bharathi, S ;

Fishelson, N ;

Lev, O .

LANGMUIR, 1999, 15 (06) :1929-1937

[4]

BRADLEY JS, 1994, CLUSTERS COLLOIDS, P510

[5] METAL-COMPLEXES IN INORGANIC MATRICES .7. NANOMETER-SIZED, UNIFORM METAL PARTICLES IN A SIO2 MATRIX BY SOL-GEL PROCESSING OF METAL-COMPLEXES [J].

BREITSCHEIDEL, B ;

ZIEDER, J ;

SCHUBERT, U .

CHEMISTRY OF MATERIALS, 1991, 3 (03) :559-566

[6] SYNTHESIS OF THIOL-DERIVATIZED GOLD NANOPARTICLES IN A 2-PHASE LIQUID-LIQUID SYSTEM [J].

BRUST, M ;

WALKER, M ;

BETHELL, D ;

SCHIFFRIN, DJ ;

WHYMAN, R .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1994, (07) :801-802

[7] Preparation of functional silane-stabilized gold colloids in the (sub)nanometer size range [J].

Buining, PA ;

Humbel, BM ;

Philipse, AP ;

Verkleij, AJ .

LANGMUIR, 1997, 13 (15) :3921-3926

[8]

CAMPBELL CT, 1990, ANNU REV PHYS CHEM, V41, P775

[9] ULTRAVIOLET VISIBLE ABSORPTION-SPECTRA OF THE COLLOIDAL METALLIC ELEMENTS [J].

CREIGHTON, JA ;

EADON, DG .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1991, 87 (24) :3881-3891

[10] PREPARATION OF BIMETALLIC PD-PT COLLOIDS IN ORGANIC-SOLVENT BY SOLVENT-EXTRACTION REDUCTION [J].

ESUMI, K ;

SHIRATORI, M ;

ISHIZUKA, H ;

TANO, T ;

TORIGOE, K ;

MEGURO, K .

LANGMUIR, 1991, 7 (03) :457-459

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