Overall water splitting by Pt/g-C(3)N(4) photocatalysts without using sacrificial agents.
Overall water splitting by Pt/g-C(3)N(4) photocatalysts without using sacrificial agents.
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DOI：
10.1039/c5sc04572j
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发表时间：
2016-05-01
期刊：
影响因子：
8.4
通讯作者：
Wang X
中科院分区：
文献类型：
--
作者：
Zhang G;Lan ZA;Lin L;Lin S;Wang X
通过共轭聚合物通过4电子途径将纯水以2：1的化学计量摩尔比直接裂解成H2和O2首次建立，如这里使用g-C3 N4聚合物和Pt和Co物种的氧化还原助催化剂所证明的。我们报告的直接分裂纯水的光激发石墨氮化碳（g-C3 N4）改性与Pt，PtOx，和CoOx作为氧化还原助催化剂，而纯g-C3 N4是几乎不活跃的整体水分裂由natural。新颖之处在于在g-C3 N4的表面活性位点上通过光沉积选择性地产生H2和O2助催化剂，该光沉积触发水的分裂，用于以2：1的化学计量比同时产生H2和O2气体，用光照射，而不使用任何牺牲试剂。光催化剂在510小时的反应中是稳定的。
Direct splitting of pure water into H2 and O2 in a stoichiometric molar ratio of 2 : 1 by conjugated polymers via a 4-electron pathway was established for the first time, as demonstrated here using a g-C3N4 polymer and redox co-catalysts of Pt and Co species. We report the direct splitting of pure water by light-excited graphitic carbon nitride (g-C3N4) modified with Pt, PtOx, and CoOx 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.