Platinum nanoparticles strongly associated with graphitic carbon nitride as efficient co-catalysts for photocatalytic hydrogen evolution under visible lightElectronic supplementary information (ESI) available: Experimental details and supplementary data (Fig. S1-S4). See DOI: 10.1039/c4cc06960a

Platinum (Pt) nanoparticles with 420 nm). This is achieved by strong Pt-support interaction due to the high temperature treatment, which facilitates efficient transfer of photoformed conduction band electrons on g-C 3 N 4 to Pt particles. Pt nanoparticles loaded on g-C 3 N 4 by the reduction at 673 K behave as efficient co-catalyst for photocatalytic H 2 hydrogen evolution under visible light.