Carbon electrodes for direct electron transfer type laccase cathodes investigated by current density-cathode potential behavior

Biosensors & Bioelectronics
S RubenwolfF von Stetten

Abstract

Direct electron transfer from carbon electrodes to adsorbed laccase (EC 1.10.3.2) from Trametes versicolor is widely used to enable mediatorless enzymatic biofuel cell cathodes. However, data published so far are poorly comparable in terms of oxygen reduction performance. We thus present a comparative characterization of carbon-based electrode materials as cathode in half-cell configuration, employing adsorbed laccase as oxygen reduction catalyst. Open circuit potentials and performances were significantly increased by laccase adsorption, indicating the occurrence of direct electron transfer. At a potential of 0.5 V vs. SCE volume-normalized current densities of approximately 10, 37, 40, 70, and 77 μA cm(-3) were measured for cathodes nanotubes, carbon nanofibers and multi-walled carbon nanotubes, respectively. In addition, we could show that both, carbon nanotubes and porous carbon tubes exhibit dramatically lower current densities compared to graphite felt and carbon nanofibers when normalized to BET surface instead of electrode volume. Further work will be required to clarify whether this stems from material-dependent interaction of enzyme and electrode surface or constricted enzyme adsorption due to agglomeration of the nan...Continue Reading

Citations

Feb 19, 2013·Bioelectrochemistry·Malika ArdhaouiFarzaneh Arefi Khonsari
Dec 31, 2010·Applied Microbiology and Biotechnology·Stefanie RubenwolfFelix von Stetten
Sep 13, 2012·Applied Microbiology and Biotechnology·S RubenwolfS Kerzenmacher
Jun 12, 2010·Biosensors & Bioelectronics·A KlokeF von Stetten
Mar 9, 2012·Biotechnology Advances·María Fernández-FernándezDiego Moldes
Jul 25, 2013·Biofabrication·Jonathan DudzikGerald F Audette
Mar 11, 2017·Nature Chemistry·Lucie AltamuraVincent Forge
Sep 21, 2017·Chemical Reviews·Nicolas Mano, Anne de Poulpiquet

❮ Previous
Next ❯

Related Concepts

Related Feeds

Biofuels (ASM)

Biofuels are produced through contemporary processes from biomass rather than geological processes involved in fossil fuel formation. Examples include biodiesel, green diesel, biogas, etc. Discover the latest research on biofuels in this feed.