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 language | English (US) |
|---|---|
| Title of host publication | ECS Transactions |
| Pages | 51-66 |
| Number of pages | 16 |
| Volume | 13 |
| Edition | 21 |
| DOIs | |
| State | Published - 2008 |
| Externally published | Yes |
| Event | Biological Fuel Cells 3 - 213th Meeting of the Electrochemical Society - Phoenix, AZ, United States Duration: May 18 2008 → May 23 2008 |
Other
| Other | Biological Fuel Cells 3 - 213th Meeting of the Electrochemical Society |
|---|---|
| Country | United States |
| City | Phoenix, AZ |
| Period | 5/18/08 → 5/23/08 |
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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 proceeding › Conference contribution
}
TY - GEN
T1 - Self assembled monolayer (SAM) of metallomacrocycle as a synthetic cathode catalyst for a hybrid bio-fuel-cell
AU - Gervasio, Dominic F
AU - Thomson, J.
PY - 2008
Y1 - 2008
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=65849124138&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=65849124138&partnerID=8YFLogxK
U2 - 10.1149/1.3036211
DO - 10.1149/1.3036211
M3 - Conference contribution
AN - SCOPUS:65849124138
SN - 9781605606590
VL - 13
SP - 51
EP - 66
BT - ECS Transactions
ER -