Ethanol electro-oxidation on partially alloyed Pt-Sn-Rh/C catalysts

被引：42
作者：
de Souza, Elson A. [1 ]
Giz, M. Janete [2 ]
Camara, Giuseppe A. [2 ]
Antolini, Ermete [3 ]
Passos, Raimundo R. [1 ]
机构：
[1] Univ Fed Amazonas, Dept Quim, Lab Eletroquim & Energia LEEN, BR-69077000 Manaus, Amazonas, Brazil
[2] Inst Chem UFMS, BR-79070900 Campo Grande, MS, Brazil
[3] Scuola Sci Mat, I-16016 Genoa, Italy
来源：
ELECTROCHIMICA ACTA | 2014年 / 147卷
关键词：
Ethanol electro-oxidation; supported catalysts; Pt-Sn-Rh/C; electrocatalysis; in-situ IRRAS; TEMPERATURE FUEL-CELLS; OXIDATION; ELECTROCATALYSTS; PLATINUM; RHODIUM; REDUCTION; METHANOL; SPECTROSCOPY; METAL; ACID;
D O I：
10.1016/j.electacta.2014.09.141
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Ternary Pt-Sn-Rh/C catalysts of Pt:Sn:Rh = 1:0.8:0.2 and 1:1:0.33 atomic ratios were synthesized using the formic acid method and their electrochemical activities were compared for ethanol oxidation with that of binary Pt-Sn/C (1:1) and Pt-Rh/C (1:0.11) catalysts. XRD analysis indicated the presence of Sn in both alloyed and oxide form and suggested the formation of a ternary Pt-Sn-Rh alloy in both catalysts. The particle size by TEM was around 3.5 nm for all catalysts. The efficiency for Pt utilization increased with Rh content. Pt-Sn-Rh/C catalysts exhibited higher catalytic activity for ethanol oxidation than Pt-Rh/C, but lower than Pt-Sn/C. Among ternary catalysts, Pt-Sn-Rh/C (1:0.8:0.2) was the most active. In situ IRRAS showed Rh plays a dual counteracting role during ethanol electro-oxidation on Pt-Sn-Rh/C catalysts, once it promotes C-C bond breaking, thus favouring CO2 formation, but hinders adsorption of ethanol, decreasing the production of acetic acid. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：483 / 489
页数：7
相关论文
共 31 条
[1]   Effect of synthesis method and structural characteristics of Pt-Sn fuel cell catalysts on the electro-oxidation of CH3OH and CH3CH2OH in acid medium [J].
Antolini, E. ;
Gonzalez, E. R. .
CATALYSIS TODAY, 2011, 160 (01) :28-38
[2]   The electro-oxidation of carbon monoxide, hydrogen/carbon monoxide and methanol in acid medium on Pt-Sn catalysts for low-temperature fuel cells: A comparative review of the effect of Pt-Sn structural characteristics [J].
Antolini, E. ;
Gonzalez, E. R. .
ELECTROCHIMICA ACTA, 2010, 56 (01) :1-14
[3]   Ethanol oxidation on carbon supported (PtSn)alloy/SnO2 and (PtSnPd)alloy/SnO2 catalysts with a fixed Pt/SnO2 atomic ratio: Effect of the alloy phase characteristics [J].
Antolini, E. ;
Colmati, F. ;
Gonzalez, E. R. .
JOURNAL OF POWER SOURCES, 2009, 193 (02) :555-561
[4]   Catalysts for direct ethanol fuel cells [J].
Antolini, Ermete .
JOURNAL OF POWER SOURCES, 2007, 170 (01) :1-12
[5]   Platinum-based ternary catalysts for low temperature fuel cells Part II. Electrochemical properties [J].
Antolini, Ermete .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2007, 74 (3-4) :337-350
[6]   The use of rare earth-based materials in low-temperature fuel cells [J].
Antolini, Ermete ;
Perez, Joelma .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2011, 36 (24) :15752-15765
[7]   Ethanol oxidation on carbon supported platinum-rhodium bimetallic catalysts [J].
Bergamaski, Kleber ;
Gonzalez, Ernesto Rafael ;
Nart, Francisco Carlos .
ELECTROCHIMICA ACTA, 2008, 53 (13) :4396-4406
[8]   INFRARED-SPECTROSCOPY OF THE ELECTRODE-ELECTROLYTE INTERPHASE [J].
BEWICK, A ;
KUNIMATSU, K ;
PONS, BS .
ELECTROCHIMICA ACTA, 1980, 25 (04) :465-468
[9]   Promising anode candidates for direct ethanol fuel cell: Carbon supported PtSn-based trimetallic catalysts prepared by Bonnemann method [J].
Beyhan, Seden ;
Coutanceau, Christophe ;
Leger, Jean-Michel ;
Napporn, Teko W. ;
Kadirgan, Figen .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2013, 38 (16) :6830-6841
[10]   Synthesis and characterization of new electrocatalysts for ethanol oxidation [J].
Bonesi, A. ;
Garaventa, G. ;
Triaca, W. E. ;
Castro Luna, A. M. .
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2008, 33 (13) :3499-3501
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