Mamuru, SAOzoemena, KIFukuda, TKobayashi, NNyokong, T2012-03-302012-03-302010-09Mamuru, 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 6367-63750013-4686http://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=ahttp://www.sciencedirect.com/science/article/pii/S0013468610008728http://hdl.handle.net/10204/5706Copyright: 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.2010.06.056Heterogeneous 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.enMetalOctabutylsulphonylphthalocyaninesMulti-walled carbon nanotubesCyclic voltammetryRDE experimentOxygen reduction reactionArticleMamuru, S., Ozoemena, K., Fukuda, T., Kobayashi, N., & 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. http://hdl.handle.net/10204/5706Mamuru, SA, KI Ozoemena, T Fukuda, N Kobayashi, and T Nyokong "Studies on the heterogeneous electron transport and oxygen reduction reaction at metal (Co, Fe) octabutylsulphonylphthalocyanines supported on multi-walled carbon nanotube modified graphite electrode." (2010) http://hdl.handle.net/10204/5706Mamuru S, Ozoemena K, Fukuda T, Kobayashi N, Nyokong T. Studies on the heterogeneous electron transport and oxygen reduction reaction at metal (Co, Fe) octabutylsulphonylphthalocyanines supported on multi-walled carbon nanotube modified graphite electrode. 2010; http://hdl.handle.net/10204/5706.TY - Article AU - Mamuru, SA AU - Ozoemena, KI AU - Fukuda, T AU - Kobayashi, N AU - Nyokong, T AB - 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. DA - 2010-09 DB - ResearchSpace DP - CSIR KW - Metal KW - Octabutylsulphonylphthalocyanines KW - Multi-walled carbon nanotubes KW - Cyclic voltammetry KW - RDE experiment KW - Oxygen reduction reaction LK - https://researchspace.csir.co.za PY - 2010 SM - 0013-4686 T1 - Studies on the heterogeneous electron transport and oxygen reduction reaction at metal (Co, Fe) octabutylsulphonylphthalocyanines supported on multi-walled carbon nanotube modified graphite electrode TI - Studies on the heterogeneous electron transport and oxygen reduction reaction at metal (Co, Fe) octabutylsulphonylphthalocyanines supported on multi-walled carbon nanotube modified graphite electrode UR - http://hdl.handle.net/10204/5706 ER -