keywords COBALT TETRAMETHOXYPHENYL PORPHYRIN Chemistry Chemistry, Multidisciplinary Energy & Fuels Engineering Engineering, Chemical Environmental Sciences Environmental Sciences & Ecology FE-BASED CATALYSTS HEAT-TREATED POLYACRYLONITRILE HIGH-AREA CARBON Life Sciences & Biomedicine MEDIATED BIOCATALYTIC CATHODES O-2 REDUCTION OXYGEN-REDUCTION REACTION PYROLYTIC-GRAPHITE ELECTRODES Physical Sciences SODIUM TUNGSTEN BRONZES Science & Technology Technology WIRED LACCASE CATHODE