POXC Laccase from Pleurotus ostreatus: A High-Performance Multicopper Enzymefor Direct Oxygen Reduction Reaction Operating in a Proton-Exchange Membrane Fuel Cell - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue ChemElectroChem Année : 2019

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

Résumé

In this work, POXC, a laccase from Pleurotus ostreatus, was immobilized on carbon nanotubes (CNTs) modified by electrografting anthraquinone and naphthoate diazonium salts. Thanks to a favorable interaction between laccase and covalently modified CNTs, this laccase exhibits high‐potential/high‐current oxygen reduction reaction (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 a gas‐diffusion electrode. Finally, owing to these unique performances, this enzyme was able to operate at the interface of the microporous layer, humidified air and a polymer electrolyte, that is, Nafion®, in a conventional H2/air proton‐exchange membrane fuel.

Domaines

Matériaux Catalyse
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Dates et versions

hal-02062189 , version 1 (18-10-2022)

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Ilaria Sorrentino, Solène Gentil, Yannig Nedellec, Serge Cosnier, Alessandra Piscitelli, et al.. POXC Laccase from Pleurotus ostreatus: A High-Performance Multicopper Enzymefor Direct Oxygen Reduction Reaction Operating in a Proton-Exchange Membrane Fuel Cell. ChemElectroChem, 2019, 6 (4), pp.1023-1027. ⟨10.1002/celc.201801264⟩. ⟨hal-02062189⟩
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