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

D. Gervasio, J. Thomson

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

5 Scopus citations

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 - Biological Fuel Cells 3
Pages51-66
Number of pages16
Edition21
DOIs
StatePublished - Dec 1 2008
Externally publishedYes
EventBiological Fuel Cells 3 - 213th Meeting of the Electrochemical Society - Phoenix, AZ, United States
Duration: May 18 2008May 23 2008

Publication series

NameECS Transactions
Number21
Volume13
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

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

ASJC Scopus subject areas

  • Engineering(all)

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    Gervasio, D., & Thomson, J. (2008). Self assembled monolayer (SAM) of metallomacrocycle as a synthetic cathode catalyst for a hybrid bio-fuel-cell. In ECS Transactions - Biological Fuel Cells 3 (21 ed., pp. 51-66). (ECS Transactions; Vol. 13, No. 21). https://doi.org/10.1149/1.3036211