The use of carbon nanotubes coated with a porous nitrogen-doped carbon layer with embedded Pt for the methanol oxidation reaction

Chun Han Hsu, Ping-Lin Kuo

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

An exceptionally durable and highly active Pt catalyst has been prepared by embedding Pt nanoparticles inside the pores of a nitrogen-doped porous carbon layer coated on carbon nanotubes (denoted as Pt@NC-CNT). The aforementioned material, under different carbonization temperatures, is characterized by transmission electron microscopy, N2 adsorption and desorption isotherms, X-ray photoelectron spectroscopy, and Raman spectroscopy. The maximum current density (Imax) during the methanol oxidation reaction (MOR) observed for Pt@NC-CNT (13.2 mA cm?1) is 20% higher than that of the commercial Pt/XC-72 (10.8 mA cm?1) catalyst. In the accelerated durability test, the Imax after 2000 cycles for Pt@NCCNT- 600 decreased from 13.2 to 6.9 mA cm?2 (48% decreased) compared with Pt/XC-72, which showed a decrease from 10.8 to 0.46 mA cm?2 (96% decreased). This indicates that the Pt@NC-CNT catalyst has extremely stable electrocatalytic activity for MOR owing to its unique structure, whereby Pt is protected by being embedded inside the pores of the nitrogen-doped carbon layer. Pt@NC-CNT's superior durability properties are further verified by observing the changes of the Pt particle sizes using TEM images before and after accelerated durability tests, as compared with Pt/XC-72.

Original languageEnglish
Pages (from-to)90-94
Number of pages5
JournalJournal of Power Sources
Volume198
DOIs
Publication statusPublished - 2012 Jan 15

Fingerprint

Carbon Nanotubes
Methanol
Carbon nanotubes
Durability
Nitrogen
Carbon
methyl alcohol
carbon nanotubes
nitrogen
Oxidation
oxidation
Catalysts
durability
carbon
Transmission electron microscopy
catalysts
Carbonization
Isotherms
Raman spectroscopy
Desorption

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Physical and Theoretical Chemistry

Cite this

@article{684cf699954e441d847fe5e15d5b83c6,
title = "The use of carbon nanotubes coated with a porous nitrogen-doped carbon layer with embedded Pt for the methanol oxidation reaction",
abstract = "An exceptionally durable and highly active Pt catalyst has been prepared by embedding Pt nanoparticles inside the pores of a nitrogen-doped porous carbon layer coated on carbon nanotubes (denoted as Pt@NC-CNT). The aforementioned material, under different carbonization temperatures, is characterized by transmission electron microscopy, N2 adsorption and desorption isotherms, X-ray photoelectron spectroscopy, and Raman spectroscopy. The maximum current density (Imax) during the methanol oxidation reaction (MOR) observed for Pt@NC-CNT (13.2 mA cm?1) is 20{\%} higher than that of the commercial Pt/XC-72 (10.8 mA cm?1) catalyst. In the accelerated durability test, the Imax after 2000 cycles for Pt@NCCNT- 600 decreased from 13.2 to 6.9 mA cm?2 (48{\%} decreased) compared with Pt/XC-72, which showed a decrease from 10.8 to 0.46 mA cm?2 (96{\%} decreased). This indicates that the Pt@NC-CNT catalyst has extremely stable electrocatalytic activity for MOR owing to its unique structure, whereby Pt is protected by being embedded inside the pores of the nitrogen-doped carbon layer. Pt@NC-CNT's superior durability properties are further verified by observing the changes of the Pt particle sizes using TEM images before and after accelerated durability tests, as compared with Pt/XC-72.",
author = "Hsu, {Chun Han} and Ping-Lin Kuo",
year = "2012",
month = "1",
day = "15",
doi = "10.1016/j.jpowsour.2011.09.020",
language = "English",
volume = "198",
pages = "90--94",
journal = "Journal of Power Sources",
issn = "0378-7753",
publisher = "Elsevier",

}

TY - JOUR

T1 - The use of carbon nanotubes coated with a porous nitrogen-doped carbon layer with embedded Pt for the methanol oxidation reaction

AU - Hsu, Chun Han

AU - Kuo, Ping-Lin

PY - 2012/1/15

Y1 - 2012/1/15

N2 - An exceptionally durable and highly active Pt catalyst has been prepared by embedding Pt nanoparticles inside the pores of a nitrogen-doped porous carbon layer coated on carbon nanotubes (denoted as Pt@NC-CNT). The aforementioned material, under different carbonization temperatures, is characterized by transmission electron microscopy, N2 adsorption and desorption isotherms, X-ray photoelectron spectroscopy, and Raman spectroscopy. The maximum current density (Imax) during the methanol oxidation reaction (MOR) observed for Pt@NC-CNT (13.2 mA cm?1) is 20% higher than that of the commercial Pt/XC-72 (10.8 mA cm?1) catalyst. In the accelerated durability test, the Imax after 2000 cycles for Pt@NCCNT- 600 decreased from 13.2 to 6.9 mA cm?2 (48% decreased) compared with Pt/XC-72, which showed a decrease from 10.8 to 0.46 mA cm?2 (96% decreased). This indicates that the Pt@NC-CNT catalyst has extremely stable electrocatalytic activity for MOR owing to its unique structure, whereby Pt is protected by being embedded inside the pores of the nitrogen-doped carbon layer. Pt@NC-CNT's superior durability properties are further verified by observing the changes of the Pt particle sizes using TEM images before and after accelerated durability tests, as compared with Pt/XC-72.

AB - An exceptionally durable and highly active Pt catalyst has been prepared by embedding Pt nanoparticles inside the pores of a nitrogen-doped porous carbon layer coated on carbon nanotubes (denoted as Pt@NC-CNT). The aforementioned material, under different carbonization temperatures, is characterized by transmission electron microscopy, N2 adsorption and desorption isotherms, X-ray photoelectron spectroscopy, and Raman spectroscopy. The maximum current density (Imax) during the methanol oxidation reaction (MOR) observed for Pt@NC-CNT (13.2 mA cm?1) is 20% higher than that of the commercial Pt/XC-72 (10.8 mA cm?1) catalyst. In the accelerated durability test, the Imax after 2000 cycles for Pt@NCCNT- 600 decreased from 13.2 to 6.9 mA cm?2 (48% decreased) compared with Pt/XC-72, which showed a decrease from 10.8 to 0.46 mA cm?2 (96% decreased). This indicates that the Pt@NC-CNT catalyst has extremely stable electrocatalytic activity for MOR owing to its unique structure, whereby Pt is protected by being embedded inside the pores of the nitrogen-doped carbon layer. Pt@NC-CNT's superior durability properties are further verified by observing the changes of the Pt particle sizes using TEM images before and after accelerated durability tests, as compared with Pt/XC-72.

UR - http://www.scopus.com/inward/record.url?scp=80755172112&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80755172112&partnerID=8YFLogxK

U2 - 10.1016/j.jpowsour.2011.09.020

DO - 10.1016/j.jpowsour.2011.09.020

M3 - Article

VL - 198

SP - 90

EP - 94

JO - Journal of Power Sources

JF - Journal of Power Sources

SN - 0378-7753

ER -