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Highly dispersed Pt nanoparticles immobilized on 1,4-benzenediamine-modified multi-walled carbon nanotube for methanol oxidation

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Abstract.
We demonstrate the use of molecular monolayers to enhance the nucleation of electrocatalytically active
platinum (Pt) nanoparticles onto multi-walled carbon nanotubes (MWCNTs). The MWCNT is embedded
within the 1,4-benzenediamine shell (NH2–MWCNT) with large amounts of amino groups outside on
the nanotube surfaces. Subsequent deposition of platinum nanoparticles led to high densities of 2 to
5 nm diameter platinum nanocrystals uniformly deposited along the length of the MWCNTs (Pt/NH2–
MWCNTs). The structure and nature of the resulting Pt/NH2–MWCNTs composites were characterized
by transmission electron microscopy and X-ray diffraction. Electrochemical measurements show that
the molecular monolayers do not impede redox behavior of the electrode, and measurements of the
electrocatalytic oxidation of methanol show very high catalytic efficiency compared with commercial ETEK
Pt/C (20 wt%) catalysts, which is crucial for anode electrocatalysis in direct methanol fuel cells.

Keywords:
NH2–MWNTs
Platinum nanoparticle
Methanol oxidation
Electrocatalyst

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Informasi Detail

Judul Seri

Journal of Colloid and Interface Science

No. Panggil

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Penerbit

London : Elsevier Inc.., 2009

Deskripsi Fisik

Journal of Colloid and Interface Science 333 (2009) 300–303

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

agus

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