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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Light induced H2 evolution in a hydrogenase-TiO2 particle system by direct electron transfer or via rhodium complexes.

Three different hydrogenases (isolated from Clostridium pasteurianum, Desulfovibrio desulfuricans strain Norway 4 and D. baculatus 9974) added to a suspension of TiO2 (anatase) powder are able to catalyze H2 evolution under band gap illumination of the semiconducting particles, and in the presence of EDTA or methanol as electron donor. This H2 production can be obtained by the direct electron transfer from the conduction band of the TiO2 particles to the active site of the enzyme at pHs higher than 7. This mediator-independent charge transfer is more efficient with C. pasteurianum and D. baculatus 9974 hydrogenases, and in the presence of methanol. Rhodium tris- and bis-bipyridyl complexes can act efficiently as electron carriers from the supporting particles to the adsorbed enzyme molecules in cases where the direct transfer is inefficient.[1]

References

  1. Light induced H2 evolution in a hydrogenase-TiO2 particle system by direct electron transfer or via rhodium complexes. Cuendet, P., Rao, K.K., Grätzel, M., Hall, D.O. Biochimie (1986) [Pubmed]
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