Fluorophilic cobalt phthalocyanine-containing Nafion membrane

High oxygen permeability and proton conductivity in the membrane

Masami Shoji, Hiroyuki Nishide

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A multiply-fluorinated cobalt phthalocyanine (CoFPC) was prepared, which could reversibly interact with oxygen. CoFPC was introduced into the hydrophobic perfluoroethylene-backbone domain of the Nafion membrane. The localization of CoFPC did not reduce the high proton conductivity (10-2-10-3 S cm-1) ascribed to the hydrophilic channel of Nafion. The oxygen permeability through the CoFPC/Nafion membrane was higher than the nitrogen permeability and that of the pristine Nafion membrane, and was significantly enhanced at the lower upstream pressure. The permselectivity of oxygen versus nitrogen increased beyond 20 with the CoFPC content in the membrane. The CoFPC/Nafion membrane was coated on a glassy carbon modified with a Pt/C catalyst. The high electrochemical reduction current of oxygen suggested that the CoFPC/Nafion membrane efficiently supplied oxygen to the Pt/C catalyst.

Original languageEnglish
Pages (from-to)646-650
Number of pages5
JournalPolymers for Advanced Technologies
Volume21
Issue number9
DOIs
Publication statusPublished - 2010 Sep

Fingerprint

Proton conductivity
Cobalt
Oxygen
Membranes
Nitrogen
Catalysts
Glassy carbon
cobalt phthalocyanine
perfluorosulfonic acid

Keywords

  • Air separation
  • Facilitated transport
  • Nafion
  • Oxygen enrichment
  • Phthalocyanine

ASJC Scopus subject areas

  • Polymers and Plastics

Cite this

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abstract = "A multiply-fluorinated cobalt phthalocyanine (CoFPC) was prepared, which could reversibly interact with oxygen. CoFPC was introduced into the hydrophobic perfluoroethylene-backbone domain of the Nafion membrane. The localization of CoFPC did not reduce the high proton conductivity (10-2-10-3 S cm-1) ascribed to the hydrophilic channel of Nafion. The oxygen permeability through the CoFPC/Nafion membrane was higher than the nitrogen permeability and that of the pristine Nafion membrane, and was significantly enhanced at the lower upstream pressure. The permselectivity of oxygen versus nitrogen increased beyond 20 with the CoFPC content in the membrane. The CoFPC/Nafion membrane was coated on a glassy carbon modified with a Pt/C catalyst. The high electrochemical reduction current of oxygen suggested that the CoFPC/Nafion membrane efficiently supplied oxygen to the Pt/C catalyst.",
keywords = "Air separation, Facilitated transport, Nafion, Oxygen enrichment, Phthalocyanine",
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T2 - High oxygen permeability and proton conductivity in the membrane

AU - Shoji, Masami

AU - Nishide, Hiroyuki

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N2 - A multiply-fluorinated cobalt phthalocyanine (CoFPC) was prepared, which could reversibly interact with oxygen. CoFPC was introduced into the hydrophobic perfluoroethylene-backbone domain of the Nafion membrane. The localization of CoFPC did not reduce the high proton conductivity (10-2-10-3 S cm-1) ascribed to the hydrophilic channel of Nafion. The oxygen permeability through the CoFPC/Nafion membrane was higher than the nitrogen permeability and that of the pristine Nafion membrane, and was significantly enhanced at the lower upstream pressure. The permselectivity of oxygen versus nitrogen increased beyond 20 with the CoFPC content in the membrane. The CoFPC/Nafion membrane was coated on a glassy carbon modified with a Pt/C catalyst. The high electrochemical reduction current of oxygen suggested that the CoFPC/Nafion membrane efficiently supplied oxygen to the Pt/C catalyst.

AB - A multiply-fluorinated cobalt phthalocyanine (CoFPC) was prepared, which could reversibly interact with oxygen. CoFPC was introduced into the hydrophobic perfluoroethylene-backbone domain of the Nafion membrane. The localization of CoFPC did not reduce the high proton conductivity (10-2-10-3 S cm-1) ascribed to the hydrophilic channel of Nafion. The oxygen permeability through the CoFPC/Nafion membrane was higher than the nitrogen permeability and that of the pristine Nafion membrane, and was significantly enhanced at the lower upstream pressure. The permselectivity of oxygen versus nitrogen increased beyond 20 with the CoFPC content in the membrane. The CoFPC/Nafion membrane was coated on a glassy carbon modified with a Pt/C catalyst. The high electrochemical reduction current of oxygen suggested that the CoFPC/Nafion membrane efficiently supplied oxygen to the Pt/C catalyst.

KW - Air separation

KW - Facilitated transport

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KW - Oxygen enrichment

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