COUPLING OF ORGANIC PIGMENT PHOTOCATALYTIC SYSTEMS TO PRODUCE HYDROGEN FROM WATER

摘要

We are developing a dual stage phot°Catalytic approach to solar water decomposition,where H2 and O2 are evolved from separate modules while a redox electrolyte flowsbetween them. Organic pigments were immobilized along with noble metal co-catalysts onacrylic flats and tested for gas evolution. Selective gas evolution using visible wavelengthlight was observed for a number of materials. Testing mediators of varying reversibility inan electr°Chemical system equivalent demonstrated that to ensure cyclical operation,provision must be made for inhibiting the phot°Catalytic back reaction.