02235nas a2200241   4500008004100000022001400041245015300055210006900208260010200277300001200379490000700391520122700398653001301625653002201638653002901660653003601689653004001725100002401765700002401789700002501813700002301838856013201861       2014                        eng d  a0250-470700aRole of iron oxide impurities in electrocatalysis by multiwall carbon nanotubes: An investigation using a novel magnetically modified ITO electrodes0 aRole of iron oxide impurities in electrocatalysis by multiwall c  aC V RAMAN AVENUE, SADASHIVANAGAR, P B \#8005, BANGALORE 560 080, INDIAbINDIAN ACAD SCIENCEScAPR  a221-2260 v373 a<p>The role of iron oxide impurities in the electrocatalytic properties of multiwall carbon nanotubes (MWCNTs) prepared by catalytic chemical vapour decomposition method (CCVD) is studied in detail. A novel magnetically modified electrodes have been developed by which MWCNTs were immobilized on indium-tin oxide (ITO) electrodes, without any chemical binders. The electro-catalytic oxidation of dopamine, and reduction of hydrogen peroxide have been studied by cyclic voltammetry on magnetically modified electrodes with (i) MWCNTs with occluded iron oxide impurities (Fe-MWCNTs), (ii) MWCNTs grown on iron oxide nanoparticle particulate films (Io-MWCNTs) and (iii) pristine iron oxide nanoparticle particulate film (Io-NPs). A shift towards less positive potentials for the oxidation of dopamine was observed which is in the order of Fe-MWCNTs &lt; Io-MWCNTs &lt; Io-NPs. Similarly, trend towards less negative potentials for the reduction of hydrogen peroxide was observed. Thus, the electrocatalytic activities displayed by MWCNTs have been attributed to the iron oxide impurities associated with it. The systematic variation was related to the nature of interaction of iron oxide nanoparticles with MWCNT surface.</p>10adopamine10aHydrogen peroxide10airon oxide nanoparticles10amagnetically-modified electrode10aMultiwall carbon nanotubes (MWCNTs)1 aSamant, Kanchan, M.1 aJoshi, Vrushali, S.1 aPatil, Kashinath, R.1 aHaram, Santosh, K.  uhttps://library.ncl.res.in/content/role-iron-oxide-impurities-electrocatalysis-multiwall-carbon-nanotubes-investigation-using-0