Photocatalyst for use in the production of hydrogen from water or aqueous solutions of organic compounds

The photocatalyst for the use in the production of hydrogen from water or aqueous solutions of organic compounds by using light energy, comprises carbon, in addition to a semiconducting photocatalytic material. The photocatalytic apparatus for the production of hydrogen from water or aqueous solutions of organic compounds by using light energy, comprises a light source, a reactor transparent for the light of the light source (2), an inlet (4) for feeding water or aqueous solution to the reactor, a gas product outlet (6), and includes a photocatalyst containing carbon, in addition to a semiconducting photocatalytic material as a photocatalyst in the reactor.