This title appears in the Scientific Report :
2011
Please use the identifier:
http://dx.doi.org/10.1016/j.elecom.2011.05.013 in citations.
Investigation of the three-dimensional ruthenium distribution in fresh and aged membrane electrode assemblies with synchrotron X-ray absorption edge tomography
Investigation of the three-dimensional ruthenium distribution in fresh and aged membrane electrode assemblies with synchrotron X-ray absorption edge tomography
Synchrotron X-ray absorption edge imaging was used to investigate the ruthenium distribution in both fresh and aged Pt/Ru-based membrane electrode assemblies (MEA) of direct methanol fuel cells. MEAs aged in different ways were analyzed: artificially aged by MeOH depletion and aged for 1700 h in an...
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Personal Name(s): | Arlt, T. |
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Manke, I. / Wippermann, K. / Totzke, C. / Markotter, H. / Riesemeier, H. / Mergel, J. / Banhart, J. | |
Contributing Institute: |
Technoökonomische Systemanalyse; IEK-3 |
Published in: | Electrochemistry communications, 13 (2011) S. 826 - 829 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2011
|
Physical Description: |
826 - 829 |
DOI: |
10.1016/j.elecom.2011.05.013 |
Document Type: |
Journal Article |
Research Program: |
Rationelle Energieumwandlung |
Series Title: |
Electrochemistry Communications
13 |
Subject (ZB): | |
Publikationsportal JuSER |
Synchrotron X-ray absorption edge imaging was used to investigate the ruthenium distribution in both fresh and aged Pt/Ru-based membrane electrode assemblies (MEA) of direct methanol fuel cells. MEAs aged in different ways were analyzed: artificially aged by MeOH depletion and aged for 1700 h in an operating fuel cell stack An element sensitive tomographic technique - differential X-ray absorption edge tomography - was applied allowing for a 3D-visualization of the ruthenium distribution within the MEA. We found a markedly changed Ru distribution after aging which is correlated to the GDL structure, the flow field geometry, and CO2 transport in the methanol solution. (C) 2011 Elsevier B.V. All rights reserved. |