Abstract
Localized hydrogen starvation at a polymer electrolyte membrane (PEM) fuel cell anode can lead to the formation of local cells in the membrane electrode assembly, which cause performance degradation at the fuel cell cathode due to carbon corrosion. We propose using hydrogen spillover materials as a hydrogen reservoir in the fuel cell anode in order to compensate for any temporary proton deficit caused by local flooding of the anode channels. We tested composite electrodes containing Ti O2, W Si2, and W O3, and compared their behavior to that of commercial Pt/Vulcan XC-72 carbon (Pt/Vu) benchmark catalysts, using gas-diffusion electrodes in a 0.1 M HCl O 4 solution and pellet electrodes in a 0.5 M H2 S O 4 solution. While Ti O2 yields no benefits, both W Si 2 and W O3 can significantly delay the voltage excursion of the gas-diffusion electrode into the oxygen evolution region upon the cessation of hydrogen flow. X-ray data indicate that the beneficial effect of W Si2 may be caused by W O3, because we observed conversion of W Si2 to W O3 during voltage cycling, without a significant loss in the apparent hydrogen adsorption-desorption area. Electrodes with W O3 yielded the best results, with a hydrogen storage charge higher by a factor of 6 than for the Pt/Vu benchmark.
| Original language | English |
|---|---|
| Journal | Journal of the Electrochemical Society |
| Volume | 158 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2011 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Electrochemistry
- Electronic, Optical and Magnetic Materials
- Materials Chemistry
- Surfaces, Coatings and Films
- Renewable Energy, Sustainability and the Environment
- Condensed Matter Physics
Cite this
Anode materials for mitigating hydrogen starvation effects in PEM fuel cells. / Halalay, Ion C.; Swathirajan, Swathy; Merzougui, Belabbes; Balogh, Michael P.; Garabedian, Gregory C.; Carpenter, Michael K.
In: Journal of the Electrochemical Society, Vol. 158, No. 3, 2011.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Anode materials for mitigating hydrogen starvation effects in PEM fuel cells
AU - Halalay, Ion C.
AU - Swathirajan, Swathy
AU - Merzougui, Belabbes
AU - Balogh, Michael P.
AU - Garabedian, Gregory C.
AU - Carpenter, Michael K.
PY - 2011
Y1 - 2011
N2 - Localized hydrogen starvation at a polymer electrolyte membrane (PEM) fuel cell anode can lead to the formation of local cells in the membrane electrode assembly, which cause performance degradation at the fuel cell cathode due to carbon corrosion. We propose using hydrogen spillover materials as a hydrogen reservoir in the fuel cell anode in order to compensate for any temporary proton deficit caused by local flooding of the anode channels. We tested composite electrodes containing Ti O2, W Si2, and W O3, and compared their behavior to that of commercial Pt/Vulcan XC-72 carbon (Pt/Vu) benchmark catalysts, using gas-diffusion electrodes in a 0.1 M HCl O 4 solution and pellet electrodes in a 0.5 M H2 S O 4 solution. While Ti O2 yields no benefits, both W Si 2 and W O3 can significantly delay the voltage excursion of the gas-diffusion electrode into the oxygen evolution region upon the cessation of hydrogen flow. X-ray data indicate that the beneficial effect of W Si2 may be caused by W O3, because we observed conversion of W Si2 to W O3 during voltage cycling, without a significant loss in the apparent hydrogen adsorption-desorption area. Electrodes with W O3 yielded the best results, with a hydrogen storage charge higher by a factor of 6 than for the Pt/Vu benchmark.
AB - Localized hydrogen starvation at a polymer electrolyte membrane (PEM) fuel cell anode can lead to the formation of local cells in the membrane electrode assembly, which cause performance degradation at the fuel cell cathode due to carbon corrosion. We propose using hydrogen spillover materials as a hydrogen reservoir in the fuel cell anode in order to compensate for any temporary proton deficit caused by local flooding of the anode channels. We tested composite electrodes containing Ti O2, W Si2, and W O3, and compared their behavior to that of commercial Pt/Vulcan XC-72 carbon (Pt/Vu) benchmark catalysts, using gas-diffusion electrodes in a 0.1 M HCl O 4 solution and pellet electrodes in a 0.5 M H2 S O 4 solution. While Ti O2 yields no benefits, both W Si 2 and W O3 can significantly delay the voltage excursion of the gas-diffusion electrode into the oxygen evolution region upon the cessation of hydrogen flow. X-ray data indicate that the beneficial effect of W Si2 may be caused by W O3, because we observed conversion of W Si2 to W O3 during voltage cycling, without a significant loss in the apparent hydrogen adsorption-desorption area. Electrodes with W O3 yielded the best results, with a hydrogen storage charge higher by a factor of 6 than for the Pt/Vu benchmark.
UR - http://www.scopus.com/inward/record.url?scp=79551598110&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79551598110&partnerID=8YFLogxK
U2 - 10.1149/1.3530796
DO - 10.1149/1.3530796
M3 - Article
AN - SCOPUS:79551598110
VL - 158
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
SN - 0013-4651
IS - 3
ER -