Please use this identifier to cite or link to this item:
Title: Do magnetically modified PtFe/C catalysts perform better in methanol electrooxidation?
Authors: Zeng, J.
Zhao, Z.
Lee, J.Y. 
Shen, P.K.
Song, S.
Keywords: CO tolerance
Heat treatment
Magnetically modified
Methanol electrooxidation
Issue Date: 1-Mar-2007
Citation: Zeng, J., Zhao, Z., Lee, J.Y., Shen, P.K., Song, S. (2007-03-01). Do magnetically modified PtFe/C catalysts perform better in methanol electrooxidation?. Electrochimica Acta 52 (11) : 3673-3679. ScholarBank@NUS Repository.
Abstract: Motivated by the demonstrated magnetic field effect on the oxygen reduction reaction in polymer electrolyte fuel cells (PEMFC), a number of PtFe/C catalysts with different magnetic characteristics were prepared and tested for methanol electrooxidation in acidic solutions at room temperature. The catalysts were characterized by transmission electron microscopy (TEM), powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray microanalysis (EDX) and vibrating sample magnetometry (VSM). The activity and CO tolerance of the catalysts in the methanol oxidation reaction (MOR) was measured by cyclic voltammetry and anodic CO stripping voltammetry, respectively. Heat treatment transformed the as-prepared PtFe/C from a face-centered cubic (fcc) structure into a face-centered tetragonal (fct) structure. Vibrating sample magnetometer (VSM) measurements confirmed the as-prepared PtFe/C as superparamagnetic, and the heat-treated catalysts as ferromagnetic. The heat-treated ferromagnetic catalysts were, however, low in specific mass activity and showed no improvement in CO tolerance relative to the as-prepared one. These results led us to conclude that the magnetic modification of catalysts through heat treatment have no practical contributions to the catalysis of MOR. © 2006 Elsevier Ltd. All rights reserved.
Source Title: Electrochimica Acta
ISSN: 00134686
DOI: 10.1016/j.electacta.2006.10.033
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Jun 23, 2021


checked on Jun 23, 2021

Page view(s)

checked on Jun 22, 2021

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.