Pt Nanoparticles@Photoactive Metal-Organic Frameworks: Efficient Hydrogen Evolution via Synergistic Photoexcitation and Electron Injection
Pt Nanoparticles@Photoactive Metal-Organic Frameworks: Efficient Hydrogen Evolution via Synergistic Photoexcitation and Electron Injection
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DOI：
10.1021/ja300539p
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发表时间：
2012-05-02
影响因子：
15
通讯作者：
Lin, Wenbin
中科院分区：
文献类型：
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作者：
Wang, Cheng;deKrafft, Kathryn E.;Lin, Wenbin
直径为2 - 3纳米和5 - 6纳米的铂纳米粒子通过金属 - 有机框架（MOF）介导的光还原K₂PtCl₄，被负载到由[Ir(ppy)₂(bpy)]⁺衍生的二羧酸配体（L - 1和L - 2）以及Zr₆(μ₃ - O)₄(μ₃ - OH)₄(羧酸盐)₁₂二级结构单元构建的稳定、多孔且具有磷光性质的金属 - 有机框架（MOF 1和2）中。所得的Pt@MOF组装体通过MOF框架的协同光激发以及电子注入到铂纳米粒子中，可作为析氢的有效光催化剂。Pt@2的转换数为7000，约为均相对照所提供数值的五倍，并且可以很容易地回收和再利用。
Pt nanoparticles of 2-3 nm and 5-6 nm in diameter were loaded into stable, porous, and phosphorescent metal-organic frameworks (MOFs 1 and 2) built from [Ir(ppy)(2)(bpy)](+)-derived dicarboxylate ligands (L-1 and L-2) and Zr-6(mu(3)-O)(4)(mu(3)-OH)(4)(carboxylate)(12) secondary building units, via MOF-mediated photo reduction of K2PtCl4. The resulting Pt@MOF assemblies serve as effective photocatalysts for hydrogen evolution by synergistic photoexcitation of the MOF frameworks and electron injection into the Pt nanoparticles. Pt@2 gave a turnover number of 7000, approximately five times the value afforded by the homogeneous control, and could be readily recycled and reused.