Determination of the electrochemically active surface area of Pt/C PEM fuel cell electrodes using different adsorbates
Watt-Smith, M. J., Friedrich, J. M., Rigby, S., Ralph, T. R. and Walsh, F. C., 2008. Determination of the electrochemically active surface area of Pt/C PEM fuel cell electrodes using different adsorbates. Journal of Physics D: Applied Physics, 41 (17), 174004.
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The characterization of fuel cell electrodes is paramount to the optimum design and performance of fuel cell systems. The specific electrochemical surface area and structural properties of two Pt/C fuel cell electrodes have been determined. Three different electrochemical adsorbates, namely, H 2 (adsorption and desorption), CO and Ag (underpotentially deposited, UPD) have shown that the estimated surface areas and roughness factors vary. These variations were shown to be ca 100% between Ag and H2 adsorption for the high-loaded sample, whilst for the low-loaded sample the difference is ca 30%. The surface areas obtained show that the low-loaded Pt electrode possesses a higher specific surface area than the higher-loaded sample. The results illustrate the importance of using multiple adsorbates to accurately determine and understand the structure of complex, porous fuel cell electrodes.
|Creators||Watt-Smith, M. J., Friedrich, J. M., Rigby, S., Ralph, T. R. and Walsh, F. C.|
|Uncontrolled Keywords||adsorbates,photolithography,cells,fuel cells,fuels,electrochemical properties,solid oxide fuel cells (sofc),electric batteries,electrodes,cytology,platinum alloys,electrochemistry,electrochemical electrodes|
|Departments||Faculty of Engineering & Design > Chemical Engineering|
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