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

研究成果: Article

24 引文 (Scopus)

摘要

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@NC-CNT-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.

原文English
頁(從 - 到)83-89
頁數7
期刊Journal of Power Sources
198
DOIs
出版狀態Published - 2012 一月 15

指紋

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

All Science Journal Classification (ASJC) codes

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

引用此文

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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@NC-CNT-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.",
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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@NC-CNT-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@NC-CNT-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.

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