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Carbon corrosion local anode hydrogen starvation

Under normal fuel cell operating conditions, the highest oxidative potentials in the cathode range between 0.6 V (vs. RHE) at high-current density and 0.95 V (vs. RHE) at open circuit (the anode potential remains always near 0 V vs. RHE), so that carbon-support corrosion is negligible. However, under start/stop conditions or in the case of localized hydrogen starvation, the cathode potential significantly exceeds 1 V versus RHE and the associated rapid carbon-support corrosion leads to... [Pg.349]

Carbon corrosion can also arise from a nonuniform distribution of fuel on the anode side (partial hydrogen coverage) and from crossover of reactant gas through the membrane. Local fuel starvations can cause this type of carbon corrosion. Because of its complexity and consequence to the durability of the fuel cell catalyst layer, local fuel starvation is both a widely studied and researched phenomena. [Pg.39]

See other pages where Carbon corrosion local anode hydrogen starvation is mentioned: [Pg.47]    [Pg.112]    [Pg.278]    [Pg.559]    [Pg.559]    [Pg.560]    [Pg.563]    [Pg.565]    [Pg.353]    [Pg.318]    [Pg.40]    [Pg.17]    [Pg.131]    [Pg.366]    [Pg.207]   
See also in sourсe #XX -- [ Pg.50 ]



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Anodic corrosion

Carbon anodes

Carbon corrosion

Carbon starvation

Carbonate corrosion

Hydrogen starvation

Local Anodes

Local corrosion

Local hydrogen starvation

Localized anodization

Localized hydrogen starvation

Starvation

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