Meso-channel development in graphitic carbon nanofibers with various structures

Donghui Long, Wei Li, Jin Miyawaki, Wenming Qiao, Licheng Ling, Isao Mochida, Seong-Ho Yoon

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A general method based on oxidation and heat expansion was developed to introduce mesoporous channels into the catalytically grown carbon nanofibers (CNFs) with platelet, herringbone, and tubular structures. Strong oxidation of CNFs caused large amounts of oxygen functionalities to be intercalated in the c-plane of the graphene layers, increasing the interlayer spacing. These intercalated components vaporized rapidly during the heat treatment, forcing apart adjacent graphene sheets and, thus, forming mesoporous channels. The obtained mesoporous CNFs maintained the fibrous form and the graphene layer alignment of their parent CNFs, but they developed aligned mesoporous channels. These channels reflected the intrinsic structure of the CNFs, which would be further adjusted by changing the oxidation degree of the CNFs or the initial crystalline structure of the CNFs. The development of mesoporous channels increased remarkably the external surface area of CNFs. It has further been demonstrated that these mesoporous CNF supported Pt nanoparticles exhibited fairly high electrocalaytic activity for methanol oxidation. As a result of their large external surface area and good crystalline structure, these mesoporous CNFs should be excellent supports for the electrodes of direct methanol fuel cells.

Original languageEnglish
Pages (from-to)4141-4148
Number of pages8
JournalChemistry of Materials
Volume23
Issue number18
DOIs
Publication statusPublished - Sep 27 2011

Fingerprint

Carbon nanofibers
Graphite
Graphene
Oxidation
Crystalline materials
Direct methanol fuel cells (DMFC)
Platelets
Methanol
Heat treatment
Oxygen
Nanoparticles
Electrodes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

Cite this

Meso-channel development in graphitic carbon nanofibers with various structures. / Long, Donghui; Li, Wei; Miyawaki, Jin; Qiao, Wenming; Ling, Licheng; Mochida, Isao; Yoon, Seong-Ho.

In: Chemistry of Materials, Vol. 23, No. 18, 27.09.2011, p. 4141-4148.

Research output: Contribution to journalArticle

Long, Donghui ; Li, Wei ; Miyawaki, Jin ; Qiao, Wenming ; Ling, Licheng ; Mochida, Isao ; Yoon, Seong-Ho. / Meso-channel development in graphitic carbon nanofibers with various structures. In: Chemistry of Materials. 2011 ; Vol. 23, No. 18. pp. 4141-4148.
@article{0a8e3bc4250e4e40b08c97e0969406f1,
title = "Meso-channel development in graphitic carbon nanofibers with various structures",
abstract = "A general method based on oxidation and heat expansion was developed to introduce mesoporous channels into the catalytically grown carbon nanofibers (CNFs) with platelet, herringbone, and tubular structures. Strong oxidation of CNFs caused large amounts of oxygen functionalities to be intercalated in the c-plane of the graphene layers, increasing the interlayer spacing. These intercalated components vaporized rapidly during the heat treatment, forcing apart adjacent graphene sheets and, thus, forming mesoporous channels. The obtained mesoporous CNFs maintained the fibrous form and the graphene layer alignment of their parent CNFs, but they developed aligned mesoporous channels. These channels reflected the intrinsic structure of the CNFs, which would be further adjusted by changing the oxidation degree of the CNFs or the initial crystalline structure of the CNFs. The development of mesoporous channels increased remarkably the external surface area of CNFs. It has further been demonstrated that these mesoporous CNF supported Pt nanoparticles exhibited fairly high electrocalaytic activity for methanol oxidation. As a result of their large external surface area and good crystalline structure, these mesoporous CNFs should be excellent supports for the electrodes of direct methanol fuel cells.",
author = "Donghui Long and Wei Li and Jin Miyawaki and Wenming Qiao and Licheng Ling and Isao Mochida and Seong-Ho Yoon",
year = "2011",
month = "9",
day = "27",
doi = "10.1021/cm200892c",
language = "English",
volume = "23",
pages = "4141--4148",
journal = "Chemistry of Materials",
issn = "0897-4756",
publisher = "American Chemical Society",
number = "18",

}

TY - JOUR

T1 - Meso-channel development in graphitic carbon nanofibers with various structures

AU - Long, Donghui

AU - Li, Wei

AU - Miyawaki, Jin

AU - Qiao, Wenming

AU - Ling, Licheng

AU - Mochida, Isao

AU - Yoon, Seong-Ho

PY - 2011/9/27

Y1 - 2011/9/27

N2 - A general method based on oxidation and heat expansion was developed to introduce mesoporous channels into the catalytically grown carbon nanofibers (CNFs) with platelet, herringbone, and tubular structures. Strong oxidation of CNFs caused large amounts of oxygen functionalities to be intercalated in the c-plane of the graphene layers, increasing the interlayer spacing. These intercalated components vaporized rapidly during the heat treatment, forcing apart adjacent graphene sheets and, thus, forming mesoporous channels. The obtained mesoporous CNFs maintained the fibrous form and the graphene layer alignment of their parent CNFs, but they developed aligned mesoporous channels. These channels reflected the intrinsic structure of the CNFs, which would be further adjusted by changing the oxidation degree of the CNFs or the initial crystalline structure of the CNFs. The development of mesoporous channels increased remarkably the external surface area of CNFs. It has further been demonstrated that these mesoporous CNF supported Pt nanoparticles exhibited fairly high electrocalaytic activity for methanol oxidation. As a result of their large external surface area and good crystalline structure, these mesoporous CNFs should be excellent supports for the electrodes of direct methanol fuel cells.

AB - A general method based on oxidation and heat expansion was developed to introduce mesoporous channels into the catalytically grown carbon nanofibers (CNFs) with platelet, herringbone, and tubular structures. Strong oxidation of CNFs caused large amounts of oxygen functionalities to be intercalated in the c-plane of the graphene layers, increasing the interlayer spacing. These intercalated components vaporized rapidly during the heat treatment, forcing apart adjacent graphene sheets and, thus, forming mesoporous channels. The obtained mesoporous CNFs maintained the fibrous form and the graphene layer alignment of their parent CNFs, but they developed aligned mesoporous channels. These channels reflected the intrinsic structure of the CNFs, which would be further adjusted by changing the oxidation degree of the CNFs or the initial crystalline structure of the CNFs. The development of mesoporous channels increased remarkably the external surface area of CNFs. It has further been demonstrated that these mesoporous CNF supported Pt nanoparticles exhibited fairly high electrocalaytic activity for methanol oxidation. As a result of their large external surface area and good crystalline structure, these mesoporous CNFs should be excellent supports for the electrodes of direct methanol fuel cells.

UR - http://www.scopus.com/inward/record.url?scp=80052978643&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80052978643&partnerID=8YFLogxK

U2 - 10.1021/cm200892c

DO - 10.1021/cm200892c

M3 - Article

AN - SCOPUS:80052978643

VL - 23

SP - 4141

EP - 4148

JO - Chemistry of Materials

JF - Chemistry of Materials

SN - 0897-4756

IS - 18

ER -