Inhibiting the recombination of electron and holes plays an essential role in photocatalytic process, particularly for metal–organic frameworks (MOFs), which had long been anticipated as high‐efficient photocatalysts. Herein, we introduce a new strategy to make efficient separation of electrons and holes for the MOF‐based photocatalyst, UiO‐66‐NH₂. At first, encapsulation of Pt nanoparticles (NPs) into UiO‐66‐NH₂ (Pt@U6N) to shorten the electrons transport distance inside of MOF crystals, then using graphene oxide to wrap the external surface of Pt@U6N to facilitate the electrons transfer on the surface. The designed structure was found to possess superior H₂‐generation ability compared to only inside or outside decorated samples, highlighting that the enhanced property strongly correlates with the inhibited recombination of electrons and holes by the inside/outside modification strategy. These findings suggest a synergistic effect of Pt NPs and graphene oxide on UiO‐66‐NH₂ and reveal a new modification strategy to enhance the catalytic activity of the photocatalysts.

中文翻译：

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增强金属有机框架的H2生成能力的策略：用于电子和空穴分离的内外装饰

抑制电子和空穴的复合在光催化过程中起着至关重要的作用，特别是对于金属有机骨架（MOF），长期以来人们一直将其视为高效的光催化剂。本文中，我们介绍了一种新的策略，可以有效地分离基于MOF的光催化剂UiO-66-NH ₂的电子和空穴。首先，将Pt纳米颗粒（NPs）封装到UiO-66-NH ₂（Pt @ U6N）中以缩短MOF晶体内部的电子传输距离，然后使用氧化石墨烯包裹Pt @ U6N的外表面以促进电子在表面上转移。发现设计的结构具有优良的H ₂与仅内部或外部装饰的样本相比，其生成能力强，强调了增强的特性与通过内部/外部修饰策略抑制的电子和空穴重组紧密相关。这些发现表明Pt NP和氧化石墨烯对UiO-66-NH ₂具有协同作用，并揭示了一种新的修饰策略以增强光催化剂的催化活性。