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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.