Visible-light Induced H2 Evolution from the Biomass Using thePhotosensitization of Chlorophyll Derivatives and Application for BiofuelCell

摘要

In this work, the visible light induced H2 evolution from sucrose using thephotosensitization of artificial Zn chlorophyll-a, which was discovered in AcidophilicBacterium A. rubrum and is expected that superior to Mg chlorophyll-a in photostability,was developed and this system was applied to photo-operated biofuel cell using chlorophyllderivative, Zn chlorin.In H2 evolution system, a solution consisting of sucrose, invertase, NAD + , glucosedehydrogenase (GDH), Zn and Mg chlorophyll-a, methyl viologen and colloidal Pt wasirradiated by visible light. After 240 min irradiation, amount of H2 evolution using Znchlorophyll-a was estimated to be 10.4 μmol. Next let us forcus on the biofuel cell usingabove system. The photovoltage and photocurrent of biofuel cell using thephotosensitization of Zn chlorin adsorbed on TiO2 film electrode were 415 mV and 9.0μAcm -2 , respectively.