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Published on: November 2, 2013
Overall water splitting by Pt/g-C3N4 photocatalysts without using sacrificial agents
Guigang Zhang1, Zhi-An Lan1, Lihua Lin1
1State Key Laboratory of Photocatalysis on Energy and Environment , College of Chemistry , Fuzhou University , Fuzhou , 350002 , China . Email: xcwang@fzu.edu.cn ; http://www.wanglab.fzu.edu.cn.
Abstract:
We report the direct splitting of pure water by light-excited graphitic carbon nitride (g-C3N4) modified with Pt, PtO , and CoO 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.
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