Enzymes 6 Osmium 6 Electrocatalysis 4 Electrodes 4 Electrolytic reduction 4 Hydrogen peroxide 4 Laccase 4 Oxidation 4 Oxide minerals 4 Oxygen 4 Oxygen cathodes 4 Oxygen partial pressure 4 Poly(allylamine) 4 Quartz 4 Self-assembled 4 Adsorption 2 Au electrodes 2 Aviation 2 Biocatalysis 2 Bioelectric Energy Sources 2 Biofuel cell 2 Biofuels 2 Biological fuel cells 2 Bipyridine 2 Catalysis 2 Catalytic reductions 2 Cathodes 2 Chlorine compounds 2 Competitive inhibition 2 Covalently bounds 2