A hybrid photoelectrochemical biofuel cell based on the photosensitization of a chlorophyll derivative on TiO2 film

A hybrid photoelectrochemical biofuel cell is composed of a TiO 2 film conductive glass electrode sensitized by a copper chlorophyll trisodium salt in combination with the platinized cathode and the electrolyte which contains redox mediator and enzyme as catalyst. The photovoltaic measurements indicate the optimal dye-adsorption time is 4   h and the incident photon-to-collected electron conversion efficiency is 16% at 400   nm. From the current–voltage curve the open-circuit voltage, short-circuit current density, maximum power density and overall energy conversion efficiency are 468   mV, 482   μA/cm 2 , 97   μW/cm 2 and 9.7%, respectively.