Real‐Time Mass Spectrometric Study of the Methanol Crossover in a Direct Methanol Fuel Cell
Open accessAbstract
The products of methanol crossover through the acid‐doped polybenzimidazole polymer electrolyte membrane (PBI PEM) to the cathode of a prototype direct methanol fuel cell (DMFC) were analyzed using multipurpose electrochemical mass spectrometry (MPEMS) coupled to the cathode exhaust gas outlet. It was found that the methanol crossing over reacts almost quantitatively to at the cathode with the platinum of the cathode acting as a heterogeneous catalyst. The cathode open‐circuit potential is inversely proportional to the amount of formed. A poisoning effect on the oxygen reduction also was found. Methods for the estimation of the methanol crossover rate at operating fuel cells are suggested.
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Pure PBI membranes reached an acid doping level of about 500 mol% H3PO4 using 9-11 M phosphoric acid at room temperature, in agreement with other reports.
“For pure PBI membranes ͑ᮀ͒, as can be seen from the figure, a doping level of around 500 mol % H 3 PO 4 can be achieved by using 9-11 M H 3 PO 4 solution at room temperature, which is in good agreement with other reports.3,6,9,12”
From Development and Characterization of Acid-Doped Polybenzimidazole/Sulfonated Polysulfone Blend Polymer Electrolytes for Fuel Cells (2001) · cites this paper as [9]
The Experimental section (p. 1233) describes a PBI membrane doped with 5 mol H3PO4 per repeat unit, or 500 mol%. It does not say that this level was achieved using 9–11 M phosphoric acid at room temperature; its reference to 5 M acid concerns electrode impregnation, not membrane doping. (LLM, conf=0.87)
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Research works printed but not linked: 6
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- [2]2. A. Küver, I. Vogel, and W. Vielstich, J. Power Sources, 52, 77 (1994).
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- [6]6. S. Wasmus, J.-T. Wang, and R. F Savinell, This Journal, 142, 3825 (1995).
- [8]8. Wolter and J. Heitbaum, Ber. Bunsenges. Phys. Chem., 88, 793 (1984).
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- Authors
- Wang, J. ‐., Wasmus, S., & Savinell, R. F.
- Affiliations
- Case Western Reserve University (US)
- Venue
- Journal of The Electrochemical Society
- Publisher
- The Electrochemical Society
- Published
- 1996-04-01
- Volume
- 143
- Issue
- 4
- Pages
- 1233-1239
- ISSN
- 0013-4651 (ISSN-L)
- 1945-7111
- OpenAlex
- W2168073753
- Cited by
- 237
- References
- 0
- Citations by year
- 2025: 3 · 2024: 2 · 2023: 1 · 2022: 1 · 2021: 3 · 2020: 1 · 2019: 2 · 2018: 3 · 2017: 2 · 2016: 6 · 2015: 10 · 2014: 10 · 2013: 6 · 2012: 7
- FWCI
- 4.85
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Journal of The Electrochemical Society (publishedVersion)
- Funders
- Case Western Reserve University
- Advanced Research Projects Agency
- Office of Naval Research (N00014)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
- Physical Sciences › Materials Science › Materials Chemistry › Advancements in Solid Oxide Fuel Cells
- Keywords
- methanol crossover, direct methanol fuel cells, polybenzimidazole membranes, open circuit potential, proton exchange membrane fuel cells
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