Electrocatalytic O2 Reduction by [Fe-Fe]-Hydrogenase Active Site Models

The instability of [Fe-Fe]-hydrogenase and its synthetic models under aerobic conditions is an inherent challenge in their development as practical H2 producing electrodes. The electrochemical oxygen reduction reaction of a series of synthetic model complexes of the [Fe-Fe] hydrogenase is investigat...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2014-06, Vol.136 (25), p.8847-8850
Main Authors: Dey, Subal, Rana, Atanu, Crouthers, Danielle, Mondal, Biswajit, Das, Pradip Kumar, Darensbourg, Marcetta Y, Dey, Abhishek
Format: Article
Language:English
Subjects:
Biosensing Techniques
Catalysis
Catalytic Domain
Electrochemical Techniques
Hydrogenase - chemistry
Hydrogenase - metabolism
Iron-Sulfur Proteins - chemistry
Iron-Sulfur Proteins - metabolism
Models, Chemical
Molecular Conformation
Oxidation-Reduction
Oxygen - chemistry
Oxygen - metabolism
Quantum Theory
Water - chemistry
Water - metabolism
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Summary:The instability of [Fe-Fe]-hydrogenase and its synthetic models under aerobic conditions is an inherent challenge in their development as practical H2 producing electrodes. The electrochemical oxygen reduction reaction of a series of synthetic model complexes of the [Fe-Fe] hydrogenase is investigated, and a dominant role of the bridgehead nitrogen in reducing the amount of partially reduced oxygen species (PROS), which is detrimental to the stability of these complexes, is discovered.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja5021684