In this work, POXC, a laccase from Pleurotus ostreatus was immobilized on carbon nanotubes (CNTs) modified by electrografting of anthraquinone and naphthoate diazonium salts. Thanks to a favorable interaction between laccase and covalently modified CNTs, this laccase exhibits high-potential/high current ORR performances, surpassing the performances of the well-known laccase from Trametes versicolor (TvLAC) immobilized on the same nanostructured electrodes. Furthermore, immobilized POXC demonstrates high ORR activity over a wide range of pH (2 to 8), being also highly active at gas-diffusion electrode (GDE). Finally, thanks to these unique performances, this enzyme was able to operate at the interface of the microporous layer, humidified air and a polymer electrolyte, ie nafion®, in a conventional H2/air protonexchange membrane fuel.

POXC Laccase from Pleurotus ostreatus: A High-Performance Multicopper Enzyme for Direct Oxygen Reduction Reaction Operating in a Proton-Exchange Membrane Fuel Cell / Sorrentino, Ilaria; Gentil, Solène; Nedellec, Yannig; Cosnier, Serge; Piscitelli, Alessandra; Giardina, Paola; Le Goff, Alan. - In: CHEMELECTROCHEM. - ISSN 2196-0216. - 6:(2019), pp. 1023-1027. [10.1002/celc.201801264]

POXC Laccase from Pleurotus ostreatus: A High-Performance Multicopper Enzyme for Direct Oxygen Reduction Reaction Operating in a Proton-Exchange Membrane Fuel Cell

Sorrentino, Ilaria;Piscitelli, Alessandra;Giardina, Paola;
2019

Abstract

In this work, POXC, a laccase from Pleurotus ostreatus was immobilized on carbon nanotubes (CNTs) modified by electrografting of anthraquinone and naphthoate diazonium salts. Thanks to a favorable interaction between laccase and covalently modified CNTs, this laccase exhibits high-potential/high current ORR performances, surpassing the performances of the well-known laccase from Trametes versicolor (TvLAC) immobilized on the same nanostructured electrodes. Furthermore, immobilized POXC demonstrates high ORR activity over a wide range of pH (2 to 8), being also highly active at gas-diffusion electrode (GDE). Finally, thanks to these unique performances, this enzyme was able to operate at the interface of the microporous layer, humidified air and a polymer electrolyte, ie nafion®, in a conventional H2/air protonexchange membrane fuel.
2019
POXC Laccase from Pleurotus ostreatus: A High-Performance Multicopper Enzyme for Direct Oxygen Reduction Reaction Operating in a Proton-Exchange Membrane Fuel Cell / Sorrentino, Ilaria; Gentil, Solène; Nedellec, Yannig; Cosnier, Serge; Piscitelli, Alessandra; Giardina, Paola; Le Goff, Alan. - In: CHEMELECTROCHEM. - ISSN 2196-0216. - 6:(2019), pp. 1023-1027. [10.1002/celc.201801264]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/744862
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