Preparation and characterization of supported Pt-Ru catalysts with a high Ru content

被引：39

作者：

dos Santos, Luciano ^{[1
]}

Colmati, Flavio ^{[1
]}

Gonzalez, Ernesto R. ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Quim Sao Carlos, CP 780, BR-13560970 Sao Carlos, SP, Brazil

来源：

JOURNAL OF POWER SOURCES | 2006年 / 159卷 / 02期

关键词：

supported catalysts; Pt-Ru; ultrathin layer RDE; H-2; oxidation; CO oxidation;

D O I：

10.1016/j.jpowsour.2005.12.086

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：

Pt-Ru nanoparticles supported on high surface area carbon were synthesized by reduction of the precursors with sodium formate, a modification of the reduction method with formic acid developed in this laboratory, which allows the incorporation of higher amounts of Ru. The catalysts were characterized by EDX and XRD. Electrochemical experiments involved cyclic voltammetry, linear sweep voltammetry and current-potential curves for the oxidation of hydrogen and carbon monoxide using an ultrathin layer rotating disc electrode. Levich and Tafel plots were used to examine the mechanism of the reactions. The results were compared with those obtained using a commercial Pt-Ru catalyst. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：869 / 877

页数：9

共 46 条

[1] X-RAY-ABSORPTION NEAR-EDGE STRUCTURE STUDY OF THE ELECTROOXIDATION REACTION OF CO ON PT50RU50 NANOPARTICLES
ABERDAM, D
DURAND, R
FAURE, R
GLOAGUEN, F
HAZEMANN, JL
HERRERO, E
KABBABI, A
ULRICH, O
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1995, 398 (1-2): : 43 - 47
[2] [Anonymous], 1969, ELECTROCHEMICAL PROC
[3] Aricò AS, 2000, J NEW MAT ELECT SYST, V3, P207
[4] Carbon monoxide electrooxidation on porous Pt-Ru electrodes in sulphuric acid
Arico, AS
Modica, E
Passalacqua, E
Antonucci, V
Antonucci, PL
[J]. JOURNAL OF APPLIED ELECTROCHEMISTRY, 1997, 27 (11) : 1275 - 1282
[5] BARD AJ, 1985, STANDARD POTENTIALS, P189
[6] Mechanism of stationary bulk CO oxidation on Pt(111) electrodes
Batista, EA
Iwasita, T
Vielstich, W
[J]. JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (38) : 14216 - 14222
[7] BOCKRIS JO, 1993, SURFACE ELECTROCHEMI, P277
[8] The CO poisoning mechanism of the hydrogen oxidation reaction in proton exchange membrane fuel cells
Camara, GA
Ticianelli, EA
Mukerjee, S
Lee, SJ
McBreen, J
[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2002, 149 (06) : A748 - A753
[9] Colmati F, 2002, J BRAZIL CHEM SOC, V13, P474
[10] COLMATI F, 2004, S BRAS EL EL SIBEE

← 1 2 3 4 5 →