This paper deposited a layer of nanometer-sized Pt50-Sn50 catalyst particles in the proton exchange membrane (PEM) surface by impregnation-reduction (IR) method to suppress the methanol crossover and improve the utilization efficiency of methanol fuel. The suppression of methanol crossover and the performance of membrane electrode assembly (MEA) for the proposed structure were compared to those with normal-PEM structure. The possible mechanism of the suppression of methanol crossover was investigated. SEM, X-ray, EDS and EPMA analysis were used to characterize microstructures, phases, chemical composition and distributions for the obtained electro-catalyst layers. Methanol crossover rate in a DMFC was determined by measuring the CO2 concentration at the cathode exit in real time. Experimental results demonstrate that the PEM with a layer of nanometer-sized Pt50-Sn50 catalyst particles suppresses methanol crossover by up to 18% more than the normal-PEM, and yield a 8% better MEA performance than the normal-MEA. The combination effects of Pt50-Sn50 in PEM as a methanol filter and electrode contribute to the suppression of methanol crossover and improvement of cell performance as well as the utilization efficiency of methanol fuel.
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ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology
June 8–10, 2009
Newport Beach, California, USA
Conference Sponsors:
- Advanced Energy Systems Division
ISBN:
978-0-7918-4881-4
PROCEEDINGS PAPER
Suppression of Methanol Crossover for Direct Methanol Fuel Cells Using a Layer of Nanometer-Sized Pt50-Sn50 Catalyst Particles Deposited on Proton Exchange Membrane Surface Available to Purchase
Chieh-Hao Wan,
Chieh-Hao Wan
MingDao University, Changhua, Taiwan
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Jyun-Ming Wei
Jyun-Ming Wei
MingDao University, Changhua, Taiwan
Search for other works by this author on:
Chieh-Hao Wan
MingDao University, Changhua, Taiwan
Jyun-Ming Wei
MingDao University, Changhua, Taiwan
Paper No:
FuelCell2009-85137, pp. 143-155; 13 pages
Published Online:
February 17, 2010
Citation
Wan, C, & Wei, J. "Suppression of Methanol Crossover for Direct Methanol Fuel Cells Using a Layer of Nanometer-Sized Pt50-Sn50 Catalyst Particles Deposited on Proton Exchange Membrane Surface." Proceedings of the ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology. ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology. Newport Beach, California, USA. June 8–10, 2009. pp. 143-155. ASME. https://doi.org/10.1115/FuelCell2009-85137
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