Decorating CoP and Pt Nanoparticles on Graphitic Carbon Nitride Nanosheets to Promote Overall Water Splitting by Conjugated Polymers
Decorating CoP and Pt Nanoparticles on Graphitic Carbon Nitride Nanosheets to Promote Overall Water Splitting by Conjugated Polymers
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DOI：
10.1002/cssc.201600850
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发表时间：
2017-01-10
期刊：
影响因子：
8.4
通讯作者：
Wang, Xinchen
中科院分区：
文献类型：
--
作者：
Pan, Zhiming;Zheng, Yun;Wang, Xinchen
利用太阳能将水分解为H-2和O-2是未来生产可再生能源的人工光合作用的关键步骤之一。在这里，我们首次使用CoP和Pt纳米颗粒作为双助催化剂来修饰石墨氮化碳（g-C3 N4）聚合物，以实现在可见光照射下的整体水分解。我们的研究结果表明，负载双助催化剂上分层的g-C3 N4赋予表面氧化还原位点的g-C3 N4纳米片，不仅可以促进催化动力学，但也促进电荷分离和迁移的软界面，从而提高整体水裂解的光催化效率。这种基于共价有机框架的稳健、丰富和稳定的光催化剂被证明通过与CoP和Pt形成异质结来催化利用光子能量将水直接分解成化学计量的H-2和O-2而具有很大的前景。
The splitting of water into H-2 and O-2 using solar energy is one of the key steps in artificial photosynthesis for the future production of renewable energy. Here, we show the first use of CoP and Pt nanoparticles as dual co-catalysts to modify graphitic carbon nitride (g-C3N4) polymer to achieve overall water splitting under visible light irradiation. Our findings demonstrate that loading dual co-catalysts on delaminated g-C3N4 imparts surface redox sites on the g-C3N4 nanosheets that can not only promote catalytic kinetics but also promote charge separation and migration in the soft interface, thus improving the photocatalytic efficiency for overall water splitting. This robust, abundant, and stable photocatalyst based on covalent organic frameworks is demonstrated to hold great promise by forming heterojunctions with CoP and Pt for catalyzing the direct splitting of water into stoichiometric H-2 and O-2 using energy from photons.