Structure-property relationship of polymeric cathode binders in microbial fuel cells

Tomonori Saito, Timothy H. Roberts, Michael Anthony Hickner, Bruce Ernest Logan

Research output: Contribution to journalConference article

Abstract

Microbial fuel cells (MFC) are a promising renewable energy production technology. Air-fed MFCs use a microbe-laden anode to liberate electrons from organic compounds, and a cathode where oxygen is reduced on the surface of an inorganic electrocatalyst, such as platinum. The electrochemical reactions to reduce oxygen to water at the cathode involve the impingement of electrons, protons, and oxygen at a catalytic site. Our previous study demonstrated that the presence of sulfonate groups in polymeric binders for the cathode impeded the oxygen reduction activity of the platinum catalyst. Here, we report the effect of hydrophilic character of non-ionic polymeric binders. Increasing the hydrophilicity by increasing length of poly(ethylene oxide) (PEO) in polystyrene-b-PEO diblock copolymer catalyst binders enhanced the electrochemical response and MFC performance due to more catalyst area being exposed to the ionic buffer. Our recent progress on understanding the electrochemical environment of the cathode catalyst will be reported.

Original languageEnglish (US)
JournalACS National Meeting Book of Abstracts
StatePublished - Dec 1 2010
Event239th ACS National Meeting and Exposition - San Francisco, CA, United States
Duration: Mar 21 2010Mar 25 2010

Fingerprint

Microbial fuel cells
Binders
Cathodes
Polyethylene oxides
Oxygen
Catalysts
Platinum
Electrons
Electrocatalysts
Polystyrenes
Hydrophilicity
Organic compounds
Block copolymers
Protons
Buffers
Anodes
Water
Air

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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abstract = "Microbial fuel cells (MFC) are a promising renewable energy production technology. Air-fed MFCs use a microbe-laden anode to liberate electrons from organic compounds, and a cathode where oxygen is reduced on the surface of an inorganic electrocatalyst, such as platinum. The electrochemical reactions to reduce oxygen to water at the cathode involve the impingement of electrons, protons, and oxygen at a catalytic site. Our previous study demonstrated that the presence of sulfonate groups in polymeric binders for the cathode impeded the oxygen reduction activity of the platinum catalyst. Here, we report the effect of hydrophilic character of non-ionic polymeric binders. Increasing the hydrophilicity by increasing length of poly(ethylene oxide) (PEO) in polystyrene-b-PEO diblock copolymer catalyst binders enhanced the electrochemical response and MFC performance due to more catalyst area being exposed to the ionic buffer. Our recent progress on understanding the electrochemical environment of the cathode catalyst will be reported.",
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Structure-property relationship of polymeric cathode binders in microbial fuel cells. / Saito, Tomonori; Roberts, Timothy H.; Hickner, Michael Anthony; Logan, Bruce Ernest.

In: ACS National Meeting Book of Abstracts, 01.12.2010.

Research output: Contribution to journalConference article

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AU - Saito, Tomonori

AU - Roberts, Timothy H.

AU - Hickner, Michael Anthony

AU - Logan, Bruce Ernest

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AB - Microbial fuel cells (MFC) are a promising renewable energy production technology. Air-fed MFCs use a microbe-laden anode to liberate electrons from organic compounds, and a cathode where oxygen is reduced on the surface of an inorganic electrocatalyst, such as platinum. The electrochemical reactions to reduce oxygen to water at the cathode involve the impingement of electrons, protons, and oxygen at a catalytic site. Our previous study demonstrated that the presence of sulfonate groups in polymeric binders for the cathode impeded the oxygen reduction activity of the platinum catalyst. Here, we report the effect of hydrophilic character of non-ionic polymeric binders. Increasing the hydrophilicity by increasing length of poly(ethylene oxide) (PEO) in polystyrene-b-PEO diblock copolymer catalyst binders enhanced the electrochemical response and MFC performance due to more catalyst area being exposed to the ionic buffer. Our recent progress on understanding the electrochemical environment of the cathode catalyst will be reported.

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