Electrodeposited Mesoporous Pt for Direct Ethanol Fuel Cells Anodes

摘要

In this study mesoporous Pt was electrodeposited from liquid crystal templates with different amount2 2 2 of Pt (0.60 mg/cm , 1.0 mg/cm and 1.5 mg/cm ) directly on a carbon cloth using a potentiostaticmethod. These mesoporous Pt electrocatalysts were used as anodes for a direct ethanol fuel cell and theactivity of ethanol oxidation reaction was studied. The electrochemical active surface area of theelectrodes was measured using cyclic voltammetry under fuel cell conditions. Polarization and powercurves for both commercial Pt and electrodeposited mesoporous Pt at different temperatures (30 C, 50C and 70 C) were studied, showing an increase of the performance with the temperature as expected.Despite lower Pt loading, all the mesoporous samples showed similar or better performances in the2 direct ethanol fuel cell when compared with the commercial Pt sample (4.0 mg/cm ). These resultsshow that this catalyst preparation method can be a new route for the development of more efficient Ptbased materials for direct alcohol fuel cells applications.