کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1288843 | 973275 | 2011 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A novel, effective and low cost catalyst for methanol oxidation based on nickel ions dispersed onto poly(o-toluidine)/Triton X-100 film at the surface of multi-walled carbon nanotube paste electrode A novel, effective and low cost catalyst for methanol oxidation based on nickel ions dispersed onto poly(o-toluidine)/Triton X-100 film at the surface of multi-walled carbon nanotube paste electrode](/preview/png/1288843.png)
In this work, for the first time an aqueous solution of Triton X-100 (TX-100) [t-octyl phenoxy polyethoxy ethanol] non-ionic surfactant is used as an additive for electropolymerization of o-toluidine (OT) onto multi-walled carbon nanotube paste electrode (CNTPE), which is investigated as a novel matrix for dispersion of nickel ions. The growth of polymeric film in the absence of TX-100 is poor, while it considerably increases in the presence of the surfactant and its growth is continued up to 60th cycle. The as-prepared substrate is used as porous matrix for dispersion of transition metal ions of Ni(II) to POT/TX-100 film by immersing the modified electrode in a 0.1 M nickel sulfate solution. The electrochemical characterization of this modified electrode exhibits redox behavior of Ni(III)/Ni(II) couple. It has been shown that POT/TX-100 at the surface of CNTPE improves catalytic efficiency of the dispersed nickel ions toward methanol oxidation. Then, using a chronoamperometric method, the catalytic rate constant, k, for methanol oxidation is found to be 7.40 × 104 cm3 mol−1 s−1. At the end of this work, long-term stability of this modified electrode has been investigated.
Journal: Journal of Power Sources - Volume 196, Issue 4, 15 February 2011, Pages 1855–1863