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Abstract:Here we report the use of cobalt and iron corrole complexes as catalysts of H2O reduction to generate H2. Electro and photocatalysis has been used in the case of dissolved corroles for water reduction with inspiring results. Carbon nanotubes doped with corroles were used as photo-electrochemical catalysts allowing getting very low overpotential values and increased hydrogen production, achieving incredibly high turnover numbers and turnover frequencies of ca. 10 7 and 10 5 , respectively. Through this last process we were able to obtain 1mmol of H2 by using minuscule amounts of catalyst, in the order of pictograms. The reactions can be carried out in water, without the need of organic solvents. Remarkably, the photoelectrochemical catalytic efficiency was increased by five orders of magnitude when adsorbing the molecular catalysts onto carbon nanotubes.

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