Electrons from hydrogen

Tipo de material: Texto

TextoSeries ; Chem. Commun., 21(23), p.3317-3325, 2009Trabajos contenidos:

Ogo, S

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Resumen: The growing need for hydrogen-based fuel cells has driven research into hydrogenase (H2ase)-a natural enzyme that catalyses the extraction of electrons from H2 in water under ambient conditions. Unfortunately, the exact mechanism by which H2ase achieves this feat has remained a matter of some controversy until now, with many mechanisms being inconsistent with experimental data. Recently, however, we have been able to produce a successful catalytic mimic of H2ase that replicates key aspects of it. This paper begins with an overview of the research from many groups that preceded this discovery, followed by a detailed analysis of the key points that set our unique functional model apart-that is to say a proton-like ''hydride'' species, a surprisingly low-valent NiIRuI complex and the key insight that two molecules of H2 are required for electron extraction.

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The growing need for hydrogen-based fuel cells has driven research into hydrogenase (H2ase)-a natural enzyme that catalyses the extraction of electrons from H2 in water under ambient conditions. Unfortunately, the exact mechanism by which H2ase achieves this feat has remained a matter of some controversy until now, with many mechanisms being inconsistent with experimental data. Recently, however, we have been able to produce a successful catalytic mimic of H2ase that replicates key aspects of it. This paper begins with an overview of the research from many groups that preceded this discovery, followed by a detailed analysis of the key points that set our unique functional model apart-that is to say a proton-like ''hydride'' species, a surprisingly low-valent NiIRuI complex and the key insight that two molecules of H2 are required for electron extraction.

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