Abstract
A novel method has been developed to debundle carbon nanotubes (CNTs) and load Pt nanoparticles on them without damaging their graphene structures. In this article, the aniline acts as a very efficient dispersing agent to debundle CNTs from 200 to 50 nm at a very low concentration of 0.5% in an IPA/water solution. The aniline-stabilized CNTs have a larger pore volume and larger amount of mesopores than pristine CNTs, and the debundling of CNTs by aniline appears to be a physical rather than a chemical process. Meanwhile, under the presence of aniline, the Pt nanoparticles are anchored on CNTs with a uniform dispersion and small particle size distribution (1.9 ± 0.4, 2.1 ± 0.3, and 2.4 ± 0.4 nm for 14.9%, 29.1%, and 49.0% Pt/CNT, respectively). It is clear that aniline functions as a dispersant and a stabilizer in this paper. These nanocomposites are applied as electrocatalysts for the cathode of a direct methanol fuel cell. The electrochemical active surface areas of Pt/CNT catalysts are higher than that of E-TEK. Compared to the E-TEK cathode catalyst, the mass activity of Pt in 14.9% Pt/CNT is 45.9 W g-1 Pt, which is about 50% higher than that of E-TEK (31.4 W g-1 Pt). The result indicates that aniline is an efficient dispersant and stabilizer for the preparation of Pt nanoparticles deposited on CNTs. Additionally, the whole process, which could be easily scaled up for industrial production, is simple, efficient, and inexpensive.
| Original language | English |
|---|---|
| Pages (from-to) | 7933-7939 |
| Number of pages | 7 |
| Journal | Journal of Physical Chemistry C |
| Volume | 114 |
| Issue number | 17 |
| DOIs | |
| Publication status | Published - 2010 May 6 |
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Energy(all)
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
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Aniline as a dispersant and stabilizer for the preparation of Pt nanoparticles deposited on carbon nanotubes. / Hsu, Chun Han; Liao, Hsin Yi; Kuo, Ping Lin.
In: Journal of Physical Chemistry C, Vol. 114, No. 17, 06.05.2010, p. 7933-7939.Research output: Contribution to journal › Article
TY - JOUR
T1 - Aniline as a dispersant and stabilizer for the preparation of Pt nanoparticles deposited on carbon nanotubes
AU - Hsu, Chun Han
AU - Liao, Hsin Yi
AU - Kuo, Ping Lin
PY - 2010/5/6
Y1 - 2010/5/6
N2 - A novel method has been developed to debundle carbon nanotubes (CNTs) and load Pt nanoparticles on them without damaging their graphene structures. In this article, the aniline acts as a very efficient dispersing agent to debundle CNTs from 200 to 50 nm at a very low concentration of 0.5% in an IPA/water solution. The aniline-stabilized CNTs have a larger pore volume and larger amount of mesopores than pristine CNTs, and the debundling of CNTs by aniline appears to be a physical rather than a chemical process. Meanwhile, under the presence of aniline, the Pt nanoparticles are anchored on CNTs with a uniform dispersion and small particle size distribution (1.9 ± 0.4, 2.1 ± 0.3, and 2.4 ± 0.4 nm for 14.9%, 29.1%, and 49.0% Pt/CNT, respectively). It is clear that aniline functions as a dispersant and a stabilizer in this paper. These nanocomposites are applied as electrocatalysts for the cathode of a direct methanol fuel cell. The electrochemical active surface areas of Pt/CNT catalysts are higher than that of E-TEK. Compared to the E-TEK cathode catalyst, the mass activity of Pt in 14.9% Pt/CNT is 45.9 W g-1 Pt, which is about 50% higher than that of E-TEK (31.4 W g-1 Pt). The result indicates that aniline is an efficient dispersant and stabilizer for the preparation of Pt nanoparticles deposited on CNTs. Additionally, the whole process, which could be easily scaled up for industrial production, is simple, efficient, and inexpensive.
AB - A novel method has been developed to debundle carbon nanotubes (CNTs) and load Pt nanoparticles on them without damaging their graphene structures. In this article, the aniline acts as a very efficient dispersing agent to debundle CNTs from 200 to 50 nm at a very low concentration of 0.5% in an IPA/water solution. The aniline-stabilized CNTs have a larger pore volume and larger amount of mesopores than pristine CNTs, and the debundling of CNTs by aniline appears to be a physical rather than a chemical process. Meanwhile, under the presence of aniline, the Pt nanoparticles are anchored on CNTs with a uniform dispersion and small particle size distribution (1.9 ± 0.4, 2.1 ± 0.3, and 2.4 ± 0.4 nm for 14.9%, 29.1%, and 49.0% Pt/CNT, respectively). It is clear that aniline functions as a dispersant and a stabilizer in this paper. These nanocomposites are applied as electrocatalysts for the cathode of a direct methanol fuel cell. The electrochemical active surface areas of Pt/CNT catalysts are higher than that of E-TEK. Compared to the E-TEK cathode catalyst, the mass activity of Pt in 14.9% Pt/CNT is 45.9 W g-1 Pt, which is about 50% higher than that of E-TEK (31.4 W g-1 Pt). The result indicates that aniline is an efficient dispersant and stabilizer for the preparation of Pt nanoparticles deposited on CNTs. Additionally, the whole process, which could be easily scaled up for industrial production, is simple, efficient, and inexpensive.
UR - http://www.scopus.com/inward/record.url?scp=77951886168&partnerID=8YFLogxK
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U2 - 10.1021/jp100328f
DO - 10.1021/jp100328f
M3 - Article
AN - SCOPUS:77951886168
VL - 114
SP - 7933
EP - 7939
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 17
ER -