Please use this identifier to cite or link to this item: https://doi.org/10.1002/fuce.200600037
Title: Increased metal utilization in carbon-supported Pt catalysts by adsorption of preformed Pt nanoparticles on colloidal silica
Authors: Zeng, J.
Lee, J.Y. 
Chen, J.
Shen, P.K.
Song, S.
Keywords: Carbon support
Colloidal silica
Electrocatalysts
Metal utilization
Methanol electrooxidation
Issue Date: Aug-2007
Source: Zeng, J., Lee, J.Y., Chen, J., Shen, P.K., Song, S. (2007-08). Increased metal utilization in carbon-supported Pt catalysts by adsorption of preformed Pt nanoparticles on colloidal silica. Fuel Cells 7 (4) : 285-290. ScholarBank@NUS Repository. https://doi.org/10.1002/fuce.200600037
Abstract: Pt/C electrocatalysts, aimed at maximizing the electrochemical surface area (ECSA) and consequently the specific mass activity of fuel cell reactions, are obtained by firstly depositing Pt nanoparticles on colloidal silica (Pt-silica), followed by the adsorption of the latter onto a carbon support. This method of catalyst preparation increases Pt metal utilization and generates accessible void space in the interpenetrating particle network of carbon and silica for the facile transport of reactants and products. Both electrochemical hydrogen adsorption/desorption and CO oxidation measurements show an increase in the ECSA using this approach. Methanol electrooxidation is used as a test reaction to evaluate the catalytic activity. It is found that the silica modified catalyst is three times as active as a catalyst prepared without silica, under otherwise identical conditions. © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.
Source Title: Fuel Cells
URI: http://scholarbank.nus.edu.sg/handle/10635/64093
ISSN: 16156846
DOI: 10.1002/fuce.200600037
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