Abstract：
: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.
journal_name
Biochimiejournal_title
Biochimieauthors
Cuendet P,Rao KK,Grätzel M,Hall DOdoi
10.1016/s0300-9084(86)81086-0subject
Has Abstractpub_date
1986-01-01 00:00:00pages
217-21issue
1eissn
0300-9084issn
1638-6183pii
S0300-9084(86)81086-0journal_volume
68pub_type
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