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A study of Faradaic phenomena in activated carbon by means of macroelectrodes and single particle electrodes

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a b s t r a c t
The electrochemical behaviour of a chemically activated carbon with oxygen-containing surface groups
was studied using a conventional macroelectrode configuration with disc electrodes and the single particle microelectrode technique. The results of both experimental set-ups were compare taking into
account the visible peaks of the surface groups, capacitance and Faradaic currents. Galvanostatic cycling
and cyclic voltammetry performed at different potential windows clearly indicated that the microelectrode
configuration was more sensitive to Faradic phenomena (i.e. oxygenated functional groups). The
incorporation of mainly CO2-evolving groups after positive polarization may cause the degradation of
the carbon material, leading to a distortion in its capacitive behaviour as a result of a restriction of the available surface area.
Keywords: Activated carbon, Surface chemistry, Supercapacitor, Cyclic voltammetry

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Informasi Detail

Judul Seri

Journal of Electroanalytical Chemistry

No. Panggil

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Penerbit

: Elsevier B.V. All rights reserved., 2008

Deskripsi Fisik

Journal of Electroanalytical Chemistry 618 (2008) 33–38

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

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