期刊
JOURNAL OF POWER SOURCES
卷 217, 期 -, 页码 142-151出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2012.06.012
关键词
Nitrogen doping; Fuel cell; Membrane electrode assembly; Platinum ruthenium; Durability; Anode
资金
- Army Research Office [W911NF-09-1-0528]
- U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, and Office of Basic Energy Science [DE-AC36-08-GO28308]
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据