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By Joseph Jason Gonzales

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Extra resources for Complicated Business: Chicanos, Museums, and Corporate Sponsors (Phd Thesis)

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81 1 Introduction Compared to polymer electrolyte membrane fuel cells that use hydrogen, direct alcohol fuel cells (DAFCs) are compact and therefore have attracted considerable attention due to their potential application as power sources for portable devices, such as cellular phones, notebook computers, and portable power supplies. Liquid fuels, such as methanol, ethanol, and ethylene glycol, have a higher volumetric energy density and better energy efficiency, and are more easily stored and transported than hydrogen.

79 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 1 Introduction Compared to polymer electrolyte membrane fuel cells that use hydrogen, direct alcohol fuel cells (DAFCs) are compact and therefore have attracted considerable attention due to their potential application as power sources for portable devices, such as cellular phones, notebook computers, and portable power supplies.

The presence of sulfur or sulfur-containing compounds in the fuel leads to degradation of anode performance even when the S content is less than 5 ppm. The nickel anode is not stable in the presence of hydrocarbons due to hydrocarbon cracking, which results from the propensity of Ni to catalyze carbon formation. The case is even worse when liquid fuel is used. Additionally, carbon deposition was reported to take place even when carbon was not the thermodynamically preferred product [60]. 3 Other Anode Materials A unique aspect of the anode in SOFCs is that one can utilize the high operation temperature (>600 C) for endothermic reforming.

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