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Membrane‐free H2/O2 fuels cells can be fabricated by coupling the redox activity of hydrogenases to oxidases.185, 186, 187 The orientation of the multicopper oxidase Trametes versicolor laccase III (PDB code: 1KYA) onto an electrode surface for O2‐reduction catalysis can be achieved through the modification of the electrode surface with anthracene substrate mimics, thereby anchoring the enzyme by the binding pocket and allowing facile direct electron transfer.185, 186
