Mesoporous Pt and Pt/Ru alloy electrocatalysts for methanol oxidation

被引：47

作者：

Franceschini, Esteban A. ^{[1
]}

Planes, Gabriel A. ^{[2
]}

Williams, Federico J. ^{[3
]}

Soler-Illia, Galo J. A. A.

Corti, Horacio R. ^{[1
,3
]}

机构：

[1] CNEA, Ctr Atom Constituyentes, Dept Fis Mat Condensada, Grp Celdas Combustible, RA-1650 Buenos Aires, DF, Argentina

[2] Univ Nacl Rio Cuarto, Fac Ciencias Exactas Fis Quim & Nat, Dept Quim, RA-5800 Rio Cuarto, Argentina

[3] Univ Buenos Aires, Fac Ciencias Exactas & Nat, CONICET, Dept Quim Inorgan Anal & Quim Fis,INQUIMAE, Buenos Aires, DF, Argentina

来源：

JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 04期

关键词：

Methanol; Fuel cells; Mesoporous; PtRu alloys; Catalyst; THIN-FILMS; PLATINUM; SILICA; CARBON; ELECTRODEPOSITION; CATALYST; COPOLYMER; TRIBLOCK; ELECTROOXIDATION; NANOPARTICLES;

D O I：

10.1016/j.jpowsour.2010.10.016

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：

Mesoporous Pt and Pt/Ru catalysts with 2D-hexagonal mesostructure were synthesized using a triblock poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) copolymer (Pluronic F127 (R)) template on a gold support Large electrochemical surface areas were observed for the catalysts prepared at high overpotentials Compared to the Pt catalyst the Pt/Ru alloy containing 3 at% of Ru exhibited lower onset potential and more than three times the limit mass activity for methanol oxidation This behavior is assigned to the larger pore size of the mesoporous Pt and Pt/Ru catalysts obtained with this template that seems to improve the methanol accessibility to the active sites compared to those obtained using lyotropic liquid crystals (C) 2010 Elsevier B V All rights reserved

引用

页码：1723 / 1729

页数：7

共 46 条

[1] POLY(ETHYLENE OXIDE)-POLY(PROPYLENE OXIDE)-POLY(ETHYLENE OXIDE) BLOCK-COPOLYMER SURFACTANTS IN AQUEOUS-SOLUTIONS AND AT INTERFACES - THERMODYNAMICS, STRUCTURE, DYNAMICS, AND MODELING [J].

ALEXANDRIDIS, P ;

HATTON, TA .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 1995, 96 (1-2) :1-46

[2] Physical and morphological characteristics and electrochemical behaviour in PEM fuel cells of PtRu/C catalysts [J].

Antolini, E ;

Giorgi, L ;

Cardellini, F ;

Passalacqua, E .

JOURNAL OF SOLID STATE ELECTROCHEMISTRY, 2001, 5 (02) :131-140

[3] Formation of carbon supported PtRu alloys: an XRD analysis [J].

Antolini, E ;

Cardellini, F .

JOURNAL OF ALLOYS AND COMPOUNDS, 2001, 315 (1-2) :118-122

[4] Mesoporous platinum films from lyotropic liquid crystalline phases [J].

Attard, GS ;

Bartlett, PN ;

Coleman, NRB ;

Elliott, JM ;

Owen, JR ;

Wang, JH .

SCIENCE, 1997, 278 (5339) :838-840

[5] Mesoporous Pt/Ru alloy from the hexagonal lyotropic liquid crystalline phase of a nonionic surfactant [J].

Attard, GS ;

Leclerc, SAA ;

Maniguet, S ;

Russell, AE ;

Nandhakumar, I ;

Bartlett, PN .

CHEMISTRY OF MATERIALS, 2001, 13 (05) :1444-+

[6] Lyotropic liquid crystalline properties of nonionic surfactant/H2O/hexachloroplatinic acid ternary mixtures used for the production of nanostructured platinum [J].

Attard, GS ;

Bartlett, PN ;

Coleman, NRB ;

Elliott, JM ;

Owen, JR .

LANGMUIR, 1998, 14 (26) :7340-7342

[7]

ATTARD GS, 1998, Patent No. 1998037997

[8]

ATTARD GS, 1998, Patent No. 1998000587

[9]

CLERC M, 1991, J PHYS II, P1263

[10] Electrochemical determination of activation energies for methanol oxidation on polycrystalline platinum in acidic and alkaline electrolytes [J].

Cohen, Jamie L. ;

Volpe, David J. ;

Abruna, Hector D. .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2007, 9 (01) :49-77

← 1 2 3 4 5 →