| Autor: |
Oughli, Alaa Alsheikh, Conzuelo, Felipe, Winkler, Martin, Happe, Thomas, Lubitz, Wolfgang, Schuhmann, Wolfgang, Rüdiger, Olaf, Plumeré, Nicolas |
| Předmět: |
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| Zdroj: |
Angewandte Chemie International Edition; Oct2015, Vol. 54 Issue 42, p12329-12333, 5p |
| Abstrakt: |
The integration of sensitive catalysts in redox matrices opens up the possibility for their protection from deactivating molecules such as O2. [FeFe]-hydrogenases are enzymes catalyzing H2 oxidation/production which are irreversibly deactivated by O2. Therefore, their use under aerobic conditions has never been achieved. Integration of such hydrogenases in viologen-modified hydrogel films allows the enzyme to maintain catalytic current for H2 oxidation in the presence of O2, demonstrating a protection mechanism independent of reactivation processes. Within the hydrogel, electrons from the hydrogenase-catalyzed H2 oxidation are shuttled to the hydrogel-solution interface for O2 reduction. Hence, the harmful O2 molecules do not reach the hydrogenase. We illustrate the potential applications of this protection concept with a biofuel cell under H2/O2 mixed feed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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