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|標題:||Electron-beam reduction method for preparing electrocatalytic particles for membrane electrode assemblies (MEA)||作者:||Pai, Y.H.
|關鍵字:||electron-beam reduction;microwave plasma chemical vapor deposition;(MPCVD) system;proton exchange membrane fuel cells (PEMFC);membrane;electrode assembly (MEA);multi walled carbon nano tubes (MWNTs);metal nanoparticles;carbon nanotubes;nanofibers||Project:||Journal of Power Sources||期刊/報告no：:||Journal of Power Sources, Volume 159, Issue 2, Page(s) 878-884.||摘要:||
A new method, the electron-beam (e-beam) reduction method, is presented for fuel cell electrocatalytic particle preparation. The method utilizes the idea of reducing ions of the catalyst species right on the carbon cloth fibers and the multi walled carbon nano tubes (MWNTs) via direct electron-beam bombardment. The morphology of the electron-beam reduced catalyst particles is presented to show that the catalyst particles were dispersed in an equal and homogeneous manner within the MWNTs/carbon cloth electrode carriers, and imply that the electroactive surface area of the e-beam reduced catalysts should assume a larger value than those from currently reported methods. With the Pt (catalyst) loadings being controlled, data obtained from electrochemical and polarization tests show that the electrodes and membrane electrode assemblies (MEA) prepared from the e-beam reduction have larger active surface areas and better working performances than those prepared from the sputtering method; the quantitative results show good consistency with the qualitative morphology images. (c) 2006 Elsevier B.V. All rights reserved.
|Appears in Collections:||工學院|
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