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Overall water splitting by Pt/g-C 3 N 4 photocatalysts without using sacrificial agents

2016; Royal Society of Chemistry; Volume: 7; Issue: 5 Linguagem: Inglês

10.1039/c5sc04572j

2041-6539

Guigang Zhang, Zhi‐An Lan, Lihua Lin, Sen Lin, Xinchen Wang,

Copper-based nanomaterials and applications

We report the direct splitting of pure water by light-excited graphitic carbon nitride (g-C3N4) modified with Pt, PtO x , and CoO x as redox cocatalysts, while pure g-C3N4 is virtually inactive for overall water splitting by photocatalysis. The novelty is in the selective creation of both H2 and O2 cocatalysts on surface active sites of g-C3N4via photodeposition triggering the splitting of water for the simultaneous evolution of H2 and O2 gases in a stoichiometric ratio of 2 : 1, irradiated with light, without using any sacrificial reagents. The photocatalyst was stable for 510 hours of reaction.