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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/5706

Title: Studies on the heterogeneous electron transport and oxygen reduction reaction at metal (Co, Fe) octabutylsulphonylphthalocyanines supported on multi-walled carbon nanotube modified graphite electrode
Authors: Mamuru, SA
Ozoemena, KI
Fukuda, T
Kobayashi, N
Nyokong, T
Keywords: Metal
Octabutylsulphonylphthalocyanines
Multi-walled carbon nanotubes
Cyclic voltammetry
RDE experiment
Oxygen reduction reaction
Issue Date: Sep-2010
Publisher: Elsevier
Citation: Mamuru, SA, Ozoemena, KI, Fukuda, T, Kobayashi, N and Nyokong, T. 2010. Studies on the heterogeneous electron transport and oxygen reduction reaction at metal (Co, Fe) octabutylsulphonylphthalocyanines supported on multi-walled carbon nanotube modified graphite electrode. Electrochimica Acta, vol. 55(22), pp 6367-6375
Series/Report no.: Workflow;6119
Abstract: Heterogeneous electron transfer dynamics and oxygen reduction reaction (ORR) activities using octabutylsulphonylphthalocyanine complexes of iron (FeOBSPc) and cobalt (CoOBSPc) supported on multi-walled carbon nanotube (MWCNT) platforms have been described. The MWCNT-based electrodes (MWCNT–CoOBSPc and MWCNT–FeOBSPc) showed larger Faradaic current responses than the electrodes without the MWCNTs, interpreted as a consequence of the trapped electrolyte species within the porous layers of MWCNTs undergoing a redox process. The EPPGE–MWCNT–FeOBSPc showed onset potential (-0.01V vs Ag|AgCl) which is comparable and even much lower than recent reports. The MWCNT–FeOBSPc showed the best ORR activity involving a direct 4-electron mechanism, with a Tafel slope of about 124 mV, indicating a 1-electron process in the rate-determining step.
Description: Copyright: 2010 Elsevier. This is an ABSTRACT ONLY. The definitive version is published in Electrochimica Acta, vol. 55(22), pp 6367-6375, doi:10.1016/j.electacta.2010.06.056
URI: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TG0-50CVR4R-3&_user=958262&_coverDate=09%2F01%2F2010&_rdoc=1&_fmt=high&_orig=gateway&_origin=gateway&_sort=d&_docanchor=&view=c&_searchStrId=1693398740&_rerunOrigin=google&_acct=C000049363&_version=1&_urlVersion=0&_userid=958262&md5=2a9beaf545313f5e8dd6e3fe27d38f68&searchtype=a
http://www.sciencedirect.com/science/article/pii/S0013468610008728
http://hdl.handle.net/10204/5706
ISSN: 0013-4686
Appears in Collections:Nanotechnology
General science, engineering & technology

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