Performance and stability of chitosan-MWCNTs-laccase biocathode: Effect of MWCNTs surface charges and ionic strength

A three-dimensional biocathode structure was fabricated by compacting chitosan, multiwall carbon nanotubes (MWCNTs) and laccase from Trametes versicolor in a mechanical press. The effect of functionalizing the MWCNTs with amine groups on the morphology, the electrocatalytic activity and the stability of the biocathode were evaluated for the direct and mediatorless oxygen reduction. The chemical groups bound to the MWCNTs surface influenced the...