Self assembled monolayer (SAM) of metallomacrocycle as a synthetic cathode catalyst for a hybrid bio-fuel-cell

Dominic F Gervasio, J. Thomson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

A hybrid bio-fuel-cell (HBFC) has one electrode with an enzyme catalyst and another with a synthetic catalyst. A new cobalt(II) porphyrin, Col, was synthesized as an oxygen reduction catalyst for a cathode in a HBFC. Col has a covalently attached phosphonate group, which gives Col affinity for metal oxide so it can form a self-assembled monolayer (SAM) on an electrode with an oxide surface. Voltammetry of a SAM of Col on an indium tin oxide (ITO) electrode in aqueous 0.01 molar TFMSA solution equilibrated with 1 atmosphere of Argon showed a surface charge corresponding to a monolayer of Col. In the same triflic acid solution equilibrated with oxygen, a bare ITO electrode did not reduce oxygen at any potential, but the same ITO electrode after coated with a SAM of Col exhibited substantial oxygen electro reduction current, which began at 0.65 V versus NHE and was not affected by the presence of methanol. This selectivity indicates that a SAM of Col is a promising catalyst for a cathode, which can selectively scavenge oxygen from biological sera which also contains alcohols and other organic species.

Original languageEnglish (US)
Title of host publicationECS Transactions
Pages51-66
Number of pages16
Volume13
Edition21
DOIs
StatePublished - 2008
Externally publishedYes
EventBiological Fuel Cells 3 - 213th Meeting of the Electrochemical Society - Phoenix, AZ, United States
Duration: May 18 2008May 23 2008

Other

OtherBiological Fuel Cells 3 - 213th Meeting of the Electrochemical Society
CountryUnited States
CityPhoenix, AZ
Period5/18/085/23/08

Fingerprint

Biological fuel cells
Self assembled monolayers
Cathodes
Electrodes
Catalysts
Tin oxides
Oxygen
Indium
Oxides
Porphyrins
Voltammetry
Surface charge
Argon
Cobalt
Monolayers
Methanol
Alcohols
Enzymes
Acids
Metals

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Self assembled monolayer (SAM) of metallomacrocycle as a synthetic cathode catalyst for a hybrid bio-fuel-cell. / Gervasio, Dominic F; Thomson, J.

ECS Transactions. Vol. 13 21. ed. 2008. p. 51-66.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Gervasio, DF & Thomson, J 2008, Self assembled monolayer (SAM) of metallomacrocycle as a synthetic cathode catalyst for a hybrid bio-fuel-cell. in ECS Transactions. 21 edn, vol. 13, pp. 51-66, Biological Fuel Cells 3 - 213th Meeting of the Electrochemical Society, Phoenix, AZ, United States, 5/18/08. https://doi.org/10.1149/1.3036211
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