TY - GEN
T1 - Enhancing enzyme fuel cell performance via use of gas phase reagents
AU - Borole, Abhijeet P.
AU - Tsouris, Costas
PY - 2009
Y1 - 2009
N2 - A laccase-based enzyme fuel cell (EFC) using air as the gas phase oxidant was developed. A three-dimensional, porous electrode coated with buffered aqueous solution containing the enzyme served as the cathode. A Pt-based gas diffusion electrode served as the anode. A maximum power density of 9.4 W m-2 (2.9 kW m-3) was obtained with 15 units of enzyme cm-2, with hydrogen as the fuel. Power density as a function of the enzyme loading, air flow rate, volume of the liquid phase and the humidity of the air stream was studied. Methanol and ethanol were also used as vapor-phase substrates delivered via an inert gas phase. The impedance distribution of the EFC was assessed using electrochemical impedance spectroscopy. The effect of humidity on the cell operation is discussed. Use of imaging techniques to delineate water distribution will also be described. Increasing enzyme loading via introduction of three-dimensionality and delivery of the fuel and the oxidant via gas-phase are evaluated as avenues for improving EFC performance.
AB - A laccase-based enzyme fuel cell (EFC) using air as the gas phase oxidant was developed. A three-dimensional, porous electrode coated with buffered aqueous solution containing the enzyme served as the cathode. A Pt-based gas diffusion electrode served as the anode. A maximum power density of 9.4 W m-2 (2.9 kW m-3) was obtained with 15 units of enzyme cm-2, with hydrogen as the fuel. Power density as a function of the enzyme loading, air flow rate, volume of the liquid phase and the humidity of the air stream was studied. Methanol and ethanol were also used as vapor-phase substrates delivered via an inert gas phase. The impedance distribution of the EFC was assessed using electrochemical impedance spectroscopy. The effect of humidity on the cell operation is discussed. Use of imaging techniques to delineate water distribution will also be described. Increasing enzyme loading via introduction of three-dimensionality and delivery of the fuel and the oxidant via gas-phase are evaluated as avenues for improving EFC performance.
UR - http://www.scopus.com/inward/record.url?scp=78649788419&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:78649788419
SN - 9780841200050
T3 - ACS National Meeting Book of Abstracts
BT - American Chemical Society - 238th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
T2 - 238th National Meeting and Exposition of the American Chemical Society, ACS 2009
Y2 - 16 August 2009 through 20 August 2009
ER -
