We
report the oriented immobilization of [NiFeSe] hydrogenases
on both covalently and noncovalently modified carbon nanotubes (CNTs)
electrodes. A specific interaction of the [NiFeSe] hydrogenase from Desulfomicrobium baculatum with hydrophobic organic molecules
was probed by electrochemistry, quartz crystal microbalance with dissipation
monitoring (QCM-D), and theoretical calculations. Taking advantage
of these hydrophobic interactions, the enzyme was efficiently wired
on anthraquinone and adamantane-modified CNTs. Because of rational
immobilization onto functionalized CNTs, the O2-tolerant
[NiFeSe]-hydrogenase is able to efficiently operate in a H2/air gas-diffusion enzymatic fuel cell.
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