High-Activity Mesoporous Pt/Ru Catalysts for Methanol Oxidation

被引：72
作者：
Franceschini, Esteban A. [1 ]
Bruno, Mariano M. [1 ,2 ]
Williams, Federico J. [3 ]
Viva, Federico A. [1 ]
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 Gral San Martin, Escuela Ciencia & Tecnol, RA-1650 Buenos Aires, DF, Argentina
[3] Univ Buenos Aires, Fac Ciencias Exactas & Nat, INQUIMAE CONICET, Dept Quim Inorgan Analit & Quim Fis, Buenos Aires, DF, Argentina
来源：
ACS APPLIED MATERIALS & INTERFACES | 2013年 / 5卷 / 21期
关键词：
fuel cells; methanol; Pt/Ru catalysts; mesoporous; mass activity; PluronicF127; PEM FUEL-CELLS; PTRU NANOPARTICLES; NICKEL NITRATE; OXYGEN ELECTROREDUCTION; NANOSTRUCTURED PLATINUM; DIFFUSION-COEFFICIENT; CARBON NANOTUBES; SILICA SBA-15; ELECTROOXIDATION; RU;
D O I：
10.1021/am403471c
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
High activity mesoporous Pt/Ru catalysts with 2D-hexagonal structure were synthesized using a triblock poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) copolymer (Pluronic F127) template. The normalized mass activities for the methanol oxidation reaction (MOR) of the Pt/Ru catalysts with a regular array of pores is higher than those reported for nanoparticulated Pt/Ru catalysts. Different kinetic parameters, as Tafel slope and activation energy, were obtained for the MOR on the mesoporous catalysts. Results indicated that catalysts performance depends on pore size. Mass activities and the CO2 conversion efficiency for large pore size mesoporous catalysts (10 nm) are greater than those reported for smaller pore size mesoporous catalysts with similar composition. The effect of pore size on catalysts performance is related to the greater accessibility of methanol to the active areas inside large pores. Consequently, the overall residence time of methanol increases as compared with mesoporous catalyst with small pores.
引用
收藏
页码：10437 / 10444
页数：8
相关论文
共 65 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]   Effect of Pt-Ru alloy composition on high-temperature methanol electro-oxidation [J].
Aricò, AS ;
Antonucci, PL ;
Modica, E ;
Baglio, V ;
Kim, H ;
Antonucci, V .
ELECTROCHIMICA ACTA, 2002, 47 (22-23) :3723-3732
[5]   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
[6]   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-+
[7]   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
[8]  
ATTARD GS, 1998, Patent No. 1998037997
[9]   Differential electrochemical mass spectrometry [J].
Baltruschat, H .
JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY, 2004, 15 (12) :1693-1706
[10]   Electrodeposited mesoporous platinum catalysts over hierarchical carbon monolithic support as anode in small PEM fuel cells [J].
Bruno, Mariano M. ;
Franceschini, Esteban A. ;
Viva, Federico A. ;
Thomas, Yohann R. I. ;
Corti, Horacio R. .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2012, 37 (19) :14911-14919
1234567