Effect of a nitrogen-doped PtRu/carbon anode catalyst on the durability of a direct methanol fuel cell

被引：40

作者：

Corpuz, A. R. ^{[1
]}

Olson, T. S. ^{[2
]}

Joghee, P. ^{[3
]}

Pylypenko, S. ^{[3
]}

Dameron, A. A. ^{[2
]}

Dinh, H. N. ^{[2
]}

O'Neill, K. J. ^{[2
]}

Hurst, K. E. ^{[2
]}

Bender, G. ^{[2
]}

Gennett, T. ^{[2
]}

Pivovar, B. S. ^{[2
]}

Richards, R. M. ^{[1
]}

O'Hayre, R. P. ^{[3
]}

机构：

[1] Colorado Sch Mines, Dept Chem, Golden, CO 80401 USA

[2] Natl Renewable Energy Lab, Golden, CO 80401 USA

[3] Colorado Sch Mines, Dept Met & Mat Engn, Golden, CO 80401 USA

来源：

JOURNAL OF POWER SOURCES | 2012年 / 217卷

关键词：

Nitrogen doping; Fuel cell; Membrane electrode assembly; Platinum ruthenium; Durability; Anode; OXYGEN REDUCTION REACTION; PLATINUM NANOPARTICLES; CARBON NANOTUBES; SUPPORT STRUCTURES; POROUS CARBON; CNX NANOTUBES; PERFORMANCE; ELECTROCATALYSTS; OXIDATION; CROSSOVER;

D O I：

10.1016/j.jpowsour.2012.06.012

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：

Electrochemical performance and durability of PtRu supported on N-doped Vulcan is evaluated as an anode in membrane electrode assembly (MEA) single-cell direct methanol fuel cell (DMFC) studies. This material is compared to two reference materials, an in-house PtRu catalyst supported on undoped Vulcan, prepared under the same conditions as the N-doped material besides doping, and a commercial PtRu/C (JM5000). Durability was tested out to 645 h, with periodic interruption for electrochemical testing. After durability, the MEA with N-doped PtRu/C retained more electrochemically active metal on the anode than the MEAs with commercial PtRu/C and undoped PtRu/C (124 compared to 106 and 82 cm(2) anode active area per cm(2) geometric surface area, respectively). From cathode CO stripping experiments and SEM-EDS studies, it was determined that the MEA with the undoped PtRu/C anode has twice as much ruthenium crossover as the MEA with the N-doped PtRu/C anode. Overall, the MEA with N-doped PtRu/C demonstrates significantly better methanol:air polarization performance compared to the MEA with undoped PtRu/C, and performs comparably to the MEA made with the commercial PtRu/C. The increase in durability for the MEA with the N-doped anode is attributed to nitrogen doping mitigating both anode metal dissolution and Ru crossover. (C) 2012 Elsevier By. All rights reserved.

引用

页码：142 / 151

页数：10

共 45 条

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