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Confinement of Ultrasmall Bimetallic Nanoparticles in Conductive Metal–Organic Frameworks via Site-Specific Nucleation
Advanced Materials ( IF 29.4 ) Pub Date : 2021-08-02 , DOI: 10.1002/adma.202101216
Chungseong Park 1, 2 , Won-Tae Koo 1, 2 , Sanggyu Chong 3 , Hamin Shin 1, 2 , Yoon Hwa Kim 1, 2 , Hee-Jin Cho 1, 2 , Ji-Soo Jang 1, 2 , Dong-Ha Kim 1, 2 , Jiyoung Lee 1, 2 , Seyeon Park 1, 2 , Jaehyun Ko 1, 2 , Jihan Kim 3 , Il-Doo Kim 1, 2
Affiliation  

Conductive metal–organic frameworks (cMOFs) are emerging materials for various applications due to their high surface area, high porosity, and electrical conductivity. However, it is still challenging to develop cMOFs having high surface reactivity and durability. Here, highly active and stable cMOF are presented via the confinement of bimetallic nanoparticles (BNPs) in the pores of a 2D cMOF, where the confinement is guided by dipolar-interaction-induced site-specific nucleation. Heterogeneous metal precursors are bound to the pores of 2D cMOFs by dipolar interactions, and the subsequent reduction produces ultrasmall (≈1.54 nm) and well-dispersed PtRu NPs confined in the pores of the cMOF. PtRu-NP-decorated cMOFs exhibit significantly enhanced chemiresistive NO2 sensing performances, owing to the bimetallic synergies of PtRu NPs and the high surface area and porosity of cMOF. The approach paves the way for the synthesis of highly active and conductive porous materials via bimetallic and/or multimetallic NP loading.

中文翻译:

超小双金属纳米粒子在导电金属中的限制 - 通过位点特定成核的有机框架

导电金属-有机骨架 (cMOF) 因其高表面积、高孔隙率和导电性而成为各种应用的新兴材料。然而,开发具有高表面反应性和耐久性的 cMOFs 仍然具有挑战性。在这里,高活性和稳定的 cMOF 通过将双金属纳米粒子 (BNP) 限制在 2D cMOF 的孔中来呈现,其中限制是由偶极相互作用诱导的位点特异性成核引导的。非均质金属前驱体通过偶极相互作用与二维 cMOF 的孔结合,随后的还原产生限制在 cMOF 孔中的超小(≈1.54 nm)和分散良好的 PtRu NP。PtRu-NP 修饰的 cMOFs 表现出显着增强的化学抗性 NO 2由于 PtRu NPs 的双金属协同作用以及 cMOF 的高表面积和孔隙率,因此提高了传感性能。该方法为通过双金属和/或多金属 NP 负载合成高活性和导电多孔材料铺平了道路。
更新日期:2021-09-21
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