Nitrogen-doped ordered mesoporous carbons as electrocatalysts for methanol-tolerant oxygen reduction in acid solution

Shou-Heng Liu, Jyun Ren Wu

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52 Citations (Scopus)

Abstract

A simple method is described for the production of Pt supported on nitrogen-doped ordered mesoporous carbons (Pt-OMCN x ) by the pyrolysis of carbon and metal precursors in a N-containing organo-functionalized mesoporous silica as the primary N sources and hard templates. The resultant Pt-OMCN x samples were thoroughly characterized by a variety of different spectroscopic and analytical techniques. Results obtained from X-ray diffraction, N 2 adsorption/desorption isotherms and transmission electron microscopy show that Pt-OMCN x possessed well-dispersed Pt nanoparticles (2-3 nm) supported on high surface area (450 m 2 g -1 ) and regular pore channels (2.5 nm). Elemental analysis and X-ray photoelectron spectroscopy indicate that ca. 1.8 wt% of N species presented on the carbon rods of Pt-OMCN x were mostly quaternary-N (55%) and pyridinic-N (45%). The Pt-OMCN x was found to have superior electrocatalytic activity and the tolerance to methanol crossover during the oxygen reduction reaction (ORR), which can be attributed to the dispersion and unique nanostructure of Pt nanoparticles particularly in the presence of pyridinic-N atoms in the mesoporous carbon supports.

Original languageEnglish
Pages (from-to)87-93
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume36
Issue number1
DOIs
Publication statusPublished - 2011 Jan 1

Fingerprint

electrocatalysts
Electrocatalysts
Methanol
methyl alcohol
Nitrogen
nitrogen
acids
Carbon
Oxygen
Acids
carbon
oxygen
Nanoparticles
nanoparticles
pyrolysis
Isotherms
Nanostructures
Desorption
crossovers
isotherms

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

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title = "Nitrogen-doped ordered mesoporous carbons as electrocatalysts for methanol-tolerant oxygen reduction in acid solution",
abstract = "A simple method is described for the production of Pt supported on nitrogen-doped ordered mesoporous carbons (Pt-OMCN x ) by the pyrolysis of carbon and metal precursors in a N-containing organo-functionalized mesoporous silica as the primary N sources and hard templates. The resultant Pt-OMCN x samples were thoroughly characterized by a variety of different spectroscopic and analytical techniques. Results obtained from X-ray diffraction, N 2 adsorption/desorption isotherms and transmission electron microscopy show that Pt-OMCN x possessed well-dispersed Pt nanoparticles (2-3 nm) supported on high surface area (450 m 2 g -1 ) and regular pore channels (2.5 nm). Elemental analysis and X-ray photoelectron spectroscopy indicate that ca. 1.8 wt{\%} of N species presented on the carbon rods of Pt-OMCN x were mostly quaternary-N (55{\%}) and pyridinic-N (45{\%}). The Pt-OMCN x was found to have superior electrocatalytic activity and the tolerance to methanol crossover during the oxygen reduction reaction (ORR), which can be attributed to the dispersion and unique nanostructure of Pt nanoparticles particularly in the presence of pyridinic-N atoms in the mesoporous carbon supports.",
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N2 - A simple method is described for the production of Pt supported on nitrogen-doped ordered mesoporous carbons (Pt-OMCN x ) by the pyrolysis of carbon and metal precursors in a N-containing organo-functionalized mesoporous silica as the primary N sources and hard templates. The resultant Pt-OMCN x samples were thoroughly characterized by a variety of different spectroscopic and analytical techniques. Results obtained from X-ray diffraction, N 2 adsorption/desorption isotherms and transmission electron microscopy show that Pt-OMCN x possessed well-dispersed Pt nanoparticles (2-3 nm) supported on high surface area (450 m 2 g -1 ) and regular pore channels (2.5 nm). Elemental analysis and X-ray photoelectron spectroscopy indicate that ca. 1.8 wt% of N species presented on the carbon rods of Pt-OMCN x were mostly quaternary-N (55%) and pyridinic-N (45%). The Pt-OMCN x was found to have superior electrocatalytic activity and the tolerance to methanol crossover during the oxygen reduction reaction (ORR), which can be attributed to the dispersion and unique nanostructure of Pt nanoparticles particularly in the presence of pyridinic-N atoms in the mesoporous carbon supports.

AB - A simple method is described for the production of Pt supported on nitrogen-doped ordered mesoporous carbons (Pt-OMCN x ) by the pyrolysis of carbon and metal precursors in a N-containing organo-functionalized mesoporous silica as the primary N sources and hard templates. The resultant Pt-OMCN x samples were thoroughly characterized by a variety of different spectroscopic and analytical techniques. Results obtained from X-ray diffraction, N 2 adsorption/desorption isotherms and transmission electron microscopy show that Pt-OMCN x possessed well-dispersed Pt nanoparticles (2-3 nm) supported on high surface area (450 m 2 g -1 ) and regular pore channels (2.5 nm). Elemental analysis and X-ray photoelectron spectroscopy indicate that ca. 1.8 wt% of N species presented on the carbon rods of Pt-OMCN x were mostly quaternary-N (55%) and pyridinic-N (45%). The Pt-OMCN x was found to have superior electrocatalytic activity and the tolerance to methanol crossover during the oxygen reduction reaction (ORR), which can be attributed to the dispersion and unique nanostructure of Pt nanoparticles particularly in the presence of pyridinic-N atoms in the mesoporous carbon supports.

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