e-journal

A comparative study of the electrochemical properties of carbon nanotubes and carbon black

---

a b s t r a c t
Two samples of commercial multi-walled carbon nanotubes (Sigma–Aldrich and Sun Nanotech) and a
sample of carbon black (Vulcan XC-72R) were investigated in raw state and after the activation in nitric
and sulfuric acid by ultrasound agitation. Atomic force microscopy revealed that activated Sigma–Aldrich
nanotubes are straight with corrugated walls (bamboo-like structure), while Sun Nanotech nanotubes are
tortuous with smooth walls. Fourier transform infrared spectroscopy showed that abundance of oxygencontaining functional groups was formed on both Sigma–Aldrich and Sun Nanotech carbon nanotubes, as
well as on carbon black surfaces. Electrochemical properties were studied by cyclic voltammetry and
electrochemical impedance spectroscopy. It was found that the electrochemically active surface area of
all carbon samples is expanded, charge storage ability is enhanced and the electron-transfer kinetics,
probed by FeðCNÞ3- 6 =FeðCNÞ4- 6 redox couple, is promoted upon activation. The characteristics of carbon
nanotubes were superior to carbon black. Morphology of the carbon nanotubes was found to be important;
nanotubes with corrugated walls showed faster electron-transfer and pseudocapacitive redox kinetics
than nanotubes with smooth walls. This was explained by the higher proportion of edge and defect
sites, which are known as more electrochemically active than the walls of uniform graphene structure.
Keywords: Carbon nanotubes, Electrochemistry, Electrochemical impedance spectroscopy, Atomic force microscopy

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

Journal of Electroanalytical Chemistry

No. Panggil

-

Penerbit

: Elsevier B.V. All rights reserved., 2009

Deskripsi Fisik

Journal of Electroanalytical Chemistry 634 (2009) 22–30

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

KIMIA KARBON

Info Detail Spesifik

-

Pernyataan Tanggungjawab

yuli/agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar