A facile and efficient γ-radiation strategy has been developed to incorporate surface-clean metal nanoparticles (NPs) into UiO-66-NH₂ in the absence of stabilizing agents and additional reductants. This approach is enabled by metal ion reduction with active e⁻_aq and H˙ species derived from water radiolysis. As a result, highly dispersed Pd NPs with narrow size distribution were generated and evenly dispersed in UiO-66-NH₂. More importantly, the radiation-reduced Pd NPs exhibit significantly enhanced catalytic activity and stability in olefin hydrogenation. Meanwhile, they are also highly active in the catalytic reduction of 4-nitrophenol to 4-aminophenol. Furthermore, the proposed radiation methodology could be successfully extended to prepare other metal NPs such as Au and Pt. Considering that γ-ray radiation is widely used in industry, this study provides a potentially scalable approach to incorporate metallic nanomaterials into metal–organic frameworks with improved catalytic performance.

中文翻译：

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使用新颖的γ射线辐射方法将表面清洁的金属纳米颗粒包裹在金属有机框架内，以增强催化作用

已经开发了一种简便而有效的γ辐射策略，可以在没有稳定剂和其他还原剂的情况下，将表面清洁的金属纳米颗粒（NPs）掺入UiO-66-NH ₂中。这种方法可以通过金属离子的还原来实现，其中金属离子可以通过水分解产生活性的e ^- _aq和H +物种。结果，产生了具有窄尺寸分布的高度分散的Pd NP并将其均匀地分散在UiO-66-NH _2中。更重要的是，减少辐射的Pd NP在烯烃加氢中表现出显着增强的催化活性和稳定性。同时，它们在将4-硝基苯酚催化还原成4-氨基苯酚中也具有很高的活性。此外，所提出的辐射方法可以成功扩展以制备其他金属NP，例如Au和Pt。考虑到γ射线辐射已在工业中广泛使用，本研究提供了一种潜在的可扩展方法，可将金属纳米材料结合到具有改进的催化性能的金属有机骨架中。