Evidences of "Through-Plane" Heterogeneities of Aging in a Proton-Exchange Membrane Fuel Cell

被引：13

作者：

Dubau, Laetitia ^{[1
]}

Guetaz, Laure ^{[2
]}

Durst, Julien ^{[1
]}

Maillard, Frederic ^{[1
]}

Chatenet, Marian ^{[1
]}

Andre, Johan ^{[3
]}

Rossinot, Elisabeth ^{[3
]}

机构：

[1] Univ Grenoble 1, Univ Savoie, Grenoble INP, CNRS,UMR 5279,LEPMI, F-38402 St Martin Dheres, France

[2] CEA, LITEN, Dept Technol Hydrogene, LCPEM, F-38054 Grenoble, France

[3] Axane, F-38360 Sassenage, France

来源：

ECS ELECTROCHEMISTRY LETTERS | 2012年 / 1卷 / 02期

关键词：

PT3CO/C ELECTROCATALYSTS; CATALYST LAYER; NANOPARTICLES; DURABILITY; PEMFC; ALLOY; INSTABILITY; DEGRADATION; SURFACE;

D O I：

10.1149/2.011202eel

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this study, we investigate "through-plane" heterogeneities of aging of a Pt3Co/C cathode electrocatalyst aged at I = 20 A or 50 A in a 16 cell proton-exchange membrane fuel cell (PEMFC) stack. Morphological and structural markers of degradation such as the mean nanoparticle size, the degree of agglomeration and the nanostructure of the Pt3Co/C nanoparticles provide evidence that the electrocatalyst degradation is (i) more pronounced close to the proton-exchange membrane (rationalized by different local/electrochemical environments) and (ii) organized in spatially-localized areas, following the incomplete utilization of the cathode electrocatalyst under the dynamic operation conditions of the PEMFC. (c) 2012 The Electrochemical Society. All rights reserved.

引用

页码：F13 / F15

页数：3

共 17 条

[1] Catalyst gradient for cathode active layer of proton exchange membrane fuel cell [J].

Antoine, O ;

Bultel, Y ;

Ozil, P ;

Durand, R .

ELECTROCHIMICA ACTA, 2000, 45 (27) :4493-4500

[2] Molecular Dynamics Simulations of Surface Oxidation on Pt(111) and Pt/PtCo/Pt3Co(111) [J].

Callejas-Tovar, Rafael ;

Liao, Wenta ;

de la Hoz, Julibeth M. Martinez ;

Balbuena, Perla B. .

JOURNAL OF PHYSICAL CHEMISTRY C, 2011, 115 (10) :4104-4113

[3] Platinum-Alloy Cathode Catalyst Degradation in Proton Exchange Membrane Fuel Cells: Nanometer-Scale Compositional and Morphological Changes [J].

Chen, Shuo ;

Gasteiger, Hubert A. ;

Hayakawa, Katsuichiro ;

Tada, Tomoyuki ;

Shao-Horn, Yang .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2010, 157 (01) :A82-A97

[4] Influence of PEMFC Operating Conditions on the Durability of Pt3Co/C Electrocatalysts [J].

Dubau, L. ;

Durst, J. ;

Maillard, F. ;

Chatenet, M. ;

Andre, J. ;

Rossinot, E. .

POLYMER ELECTROLYTE FUEL CELLS 10, PTS 1 AND 2, 2010, 33 (01) :399-+

[5] Heterogeneities of Aging within a PEMFC MEA [J].

Dubau, L. ;

Durst, J. ;

Maillard, F. ;

Chatenet, M. ;

Andre, J. ;

Rossinot, E. .

FUEL CELLS, 2012, 12 (02) :188-198

[6] Further insights into the durability of Pt3Co/C electrocatalysts: Formation of "hollow" Pt nanoparticles induced by the Kirkendall effect [J].

Dubau, L. ;

Durst, J. ;

Maillard, F. ;

Guetaz, L. ;

Chatenet, M. ;

Andre, J. ;

Rossinot, E. .

ELECTROCHIMICA ACTA, 2011, 56 (28) :10658-10667

[7] Nanoscale compositional changes and modification of the surface reactivity of Pt3Co/C nanoparticles during proton-exchange membrane fuel cell operation [J].

Dubau, L. ;

Maillard, F. ;

Chatenet, M. ;

Andre, J. ;

Rossinot, E. .

ELECTROCHIMICA ACTA, 2010, 56 (02) :776-783

[8] Durability of Pt3Co/C Cathodes in a 16 Cell PEMFC Stack: Macro/Microstructural Changes and Degradation Mechanisms [J].

Dubau, L. ;

Maillard, F. ;

Chatenet, M. ;

Guetaz, Laure ;

Andre, J. ;

Rossinot, E. .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2010, 157 (12) :B1887-B1895

[9] Instability of Pt/C electrocatalysts in proton exchange membrane fuel cells - A mechanistic investigation [J].

Ferreira, PJ ;

la O', GJ ;

Shao-Horn, Y ;

Morgan, D ;

Makharia, R ;

Kocha, S ;

Gasteiger, HA .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2005, 152 (11) :A2256-A2271

[10] Activity benchmarks and requirements for Pt, Pt-alloy, and non-Pt oxygen reduction catalysts for PEMFCs [J].

Gasteiger, HA ;

Kocha, SS ;

Sompalli, B ;

Wagner, FT .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2005, 56 (1-2) :9-35

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