Characterisation of porous carbon electrode materials used in proton exchange membrane fuel cells via gas adsorption
Watt-Smith, M. J., Rigby, S., Ralph, T. R. and Walsh, F. C., 2008. Characterisation of porous carbon electrode materials used in proton exchange membrane fuel cells via gas adsorption. Journal of Power Sources, 184 (1), pp. 29-37.
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Porous carbon materials are typically used in both the substrate (typically carbon paper) and the electrocatalyst supports (often platinised carbon) within proton exchange membrane fuel cells. Gravimetric nitrogen adsorption has been studied at a carbon paper substrate, two different Pt-loaded carbon paper electrodes and three particulate carbon blacks. N2 BET surface areas and surface fractal dimensions were determined using the fractal BET and Frenkel-Halsey-Hill models for all but one of the materials studied. The fractal dimensions of the carbon blacks obtained from gas adsorption were compared with those obtained independently by small angle X-ray scattering and showed good agreement. Density functional theory was used to characterise one of the carbon blacks, as the standard BET model was not applicable.
|Creators||Watt-Smith, M. J., Rigby, S., Ralph, T. R. and Walsh, F. C.|
|Uncontrolled Keywords||paper, carbon black, protons, fuel cells, ion exchange membranes, gas fuel purification, proton exchange membrane fuel cells (pemfc), solid oxide fuel cells (sofc), gas adsorption, carbon, electric batteries, electrodes, metallizing, platinum, adsorption, electrocatalysts, electrochemistry, nitrogen, direct energy conversion|
|Departments||Faculty of Engineering & Design > Chemical Engineering|
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