Preparation of platinum-ruthenium alloys supported on carbon by a sonochemical method

被引：35

作者：

Angelucci, Camilo A. ^{[1
]}

Silva, Melina D'Villa ^{[1
]}

Nart, Francisco C. ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560 Sao Carlos, SP, Brazil

来源：

ELECTROCHIMICA ACTA | 2007年 / 52卷 / 25期

基金：

巴西圣保罗研究基金会;

关键词：

sonochemical reduction; platinum-ruthenium alloys; methanol electro-oxidation;

D O I：

10.1016/j.electacta.2007.05.069

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Pt and Pt-Ru alloys with several Pt/Ru ratios supported on carbon (Vulcan) were prepared using high-intensity ultrasound by reduction of H2PtCl6 and RuCl3 precursors in an aqueous solution. This method of catalyst preparation was performed in absence of any surfactant or organic addictive. The particles formed were characterized by X-ray diffraction (XRD), energy dispersive X-ray (EDX) and transmission electron microscopy (TEM). From the XRD studies, a decrease of metal particle size and of the lattice parameters was observed with the increase of the Ru content. The electroactivities were tested for the methanol oxidation reaction in acid electrolyte, and it was found that Pt-Ru catalysts were more activity than pure Pt. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：7293 / 7299

页数：7

共 46 条

[1] Shape-controlled synthesis of colloidal platinum nanoparticles
Ahmadi, TS
Wang, ZL
Green, TC
Henglein, A
ElSayed, MA
[J]. SCIENCE, 1996, 272 (5270) : 1924 - 1926
[2] Effect of Pt-Ru alloy composition on high-temperature methanol electro-oxidation
Aricò, AS
Antonucci, PL
Modica, E
Baglio, V
Kim, H
Antonucci, V
[J]. ELECTROCHIMICA ACTA, 2002, 47 (22-23) : 3723 - 3732
[3] MEAN COORDINATION NUMBERS AND THE NONMETAL METAL TRANSITION IN CLUSTERS
BENFIELD, RE
[J]. JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1992, 88 (08): : 1107 - 1110
[4] Correlation of electrochemical and physical properties of PtRu alloy electrocatalysts for PEM fuel cells
Camara, GA
Giz, MJ
Paganin, VA
Ticianelli, EA
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2002, 537 (1-2) : 21 - 29
[5] Sonochemical formation of colloidal platinum
Caruso, RA
Ashokkumar, M
Grieser, F
[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2000, 169 (1-3) : 219 - 225
[6] Supported mixed metal nanoparticles as electrocatalysts in low temperature fuel cells
Chan, KY
Ding, J
Ren, JW
Cheng, SA
Tsang, KY
[J]. JOURNAL OF MATERIALS CHEMISTRY, 2004, 14 (04) : 505 - 516
[7] Anode materials for low-temperature fuel cells: A density functional theory study
Christoffersen, E
Liu, P
Ruban, A
Skriver, HL
Norskov, JK
[J]. JOURNAL OF CATALYSIS, 2001, 199 (01) : 123 - 131
[8] Surface structure effects in platinum/ruthenium methanol oxidation electrocatalysis
Chrzanowski, W
Wieckowski, A
[J]. LANGMUIR, 1998, 14 (08) : 1967 - 1970
[9] Cullity B.D., 1967, Elements of X-Ray Diffraction
[10] VEGARD LAW
DENTON, AR
ASHCROFT, NW
[J]. PHYSICAL REVIEW A, 1991, 43 (06): : 3161 - 3164

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