Corrosion Simulation Tests of Phosphoric Acid Fuel Cells

Mitsuda, Kenro; Shiota, Hirotaka; Murahashi, Toshiaki

doi:10.5006/1.3585160

Cited by 15 publications

(6 citation statements)

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“…However, these half-cell investigations are not sufficient to fully evaluate performance of electrodes in scaled-up single cells. For example, we observed that an increase of the operating pressure decreased the voltage loss due to CO poisoning (11). The phenomena could not be explained by the half-cell studies (6, 7) alone.…”

mentioning

confidence: 69%

“…Thus corrosion of the carbon cathode is likely to occur in this area (near the fuel outlet). Carbon corrosion of the cathode opposite the fuel outlet area has been observed, when PAFC was operated at a high hydrogen utilization (22). The measured ohmic loss of Cx-Ax and Cx-Rx was about 160 mV at 100 mA/cm 2 and almost the same in the horizontal plane, but the ohmic loss of Ax-Rx or R=-Ry was negligible (within 1 mV at 100 mA/cm2).…”

Section: U Alternate Change Of Reactants--gas Cycle Tests Werementioning

confidence: 97%

“…According to half-cell results, it was expected that the CO loss was independent of operating pressure. We investigated the dependence of the CO loss on operating pressure and found that pressurization decreases the CO loss (11). This phenomenon cannot be explained if we consider only the anode overpotential, because not only the partial pressure of hydrogen, but also the partial pressure of carbon monoxide, increases with the increase of operating pressure.…”

Section: Rhe At 190~mentioning

confidence: 99%

“…Manuscript submitted April 14, 1989; revised manuscript received May 26, 1990. A major portion of this paper was Paper 52 presented at the Chicago, Illinois, meeting of the Society, Oct. [9][10][11][12][13][14] 1988.…”

Section: Acknowledgmentmentioning

confidence: 99%

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Polarization Study of a Fuel Cell with Four Reference Electrodes

Mitsuda¹,

Murahashi²

1990

J. Electrochem. Soc.

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The changes in the anode and cathode potentials of a phosphoric acid fuel cell under various conditions were studied using a single cell equipped with four reversible hydrogen electrodes located near the inlets and outlets. When pure hydrogen gas was used as a fuel, the polarizations under load were homogeneous in the plane of the cell. However, when the reformate gas was used, inhomogeneity in the plane arose under load. The cathode and anode potentials shifted in the positive direction at the fuel outlet area. The potential shifts increased with an increase of fuel utilization or due to CO poisoning. The voltage loss due to CO poisoning ( CO loss) caused an increase not only of the anode polarization but also of the cathode polarization in the fuel inlet area. The increase of cathode polarization at the fuel inlet area was due to current convergence into the fuel inlet area. The potential shifts at the fuel outlet can be attributed to the acidity change of electrolyte there. The local acidity change of electrolyte can arise from a local starvation of hydrogen and hence of protons.

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mentioning

confidence: 69%

Section: U Alternate Change Of Reactants--gas Cycle Tests Werementioning

confidence: 97%

Section: Rhe At 190~mentioning

confidence: 99%

Section: Acknowledgmentmentioning

confidence: 99%

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Polarization Study of a Fuel Cell with Four Reference Electrodes

Mitsuda¹,

Murahashi²

1990

J. Electrochem. Soc.

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“…Compared to LT-PEMFCs, the presence of phosphoric acid adds to the intricacy because platinum ions can form complexes with phosphate species [48,49]. If the phosphoric acid in the cathode catalyst layer is dehydrated and partly condensed, platinum compounds of pyro-and metaphosphates may form in favor of platinum orthophosphate compounds.…”

Section: The Role Of Water In the Loss Of Platinum Surface Areamentioning

confidence: 99%

Catalyst Degradation Under Potential Cycling as an Accelerated Stress Test for PBI-Based High-Temperature PEM Fuel Cells—Effect of Humidification

et al. 2017

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