He Su, Chen Yifeng, Zhang Zhicheng, Ni Bing, He Wei, Wang Xun
Department of Chemistry , Tsinghua University , Beijing , 100084 , China . Email:
School of Pharmaceutical Science , Tsinghua University , Beijing , 100084 , China.
Chem Sci. 2016 Dec 1;7(12):7101-7105. doi: 10.1039/c6sc02272c. Epub 2016 Aug 5.
Metal-organic frameworks (MOFs) usually have micropores smaller than 2 nm, which may restrict their applications in some cases. Hierarchical-pore MOFs (H-MOFs) are a new family of MOF materials, possessing both micro- and mesopores to address this problem. Here we demonstrate a competitive coordination strategy for the synthesis of H-MOF nanostructures, such as two-dimensional (2D) H-MOF nanosheets and H-MOF nanocubes, evolving through an etching process tuned by a competitive ligand. The as-synthesized 2D H-MOF nanosheets can serve as a substrate to immobilize Pd nanoparticles to achieve a surfactant-free Pd catalyst, by means of a simple soaking method of Pd precursors. Combined with the unique structure and gas adsorption capacity of H-MOF-5, the Pd-H-MOF-5 catalyst exhibits superior catalytic performance.
金属有机框架材料（MOFs）通常具有小于2纳米的微孔，这在某些情况下可能会限制它们的应用。分级孔MOFs（H-MOFs）是一类新型的MOF材料，同时拥有微孔和介孔以解决这一问题。在此，我们展示了一种用于合成H-MOF纳米结构的竞争性配位策略，例如二维（2D）H-MOF纳米片和H-MOF纳米立方体，该策略通过由竞争性配体调节的蚀刻过程逐步形成。通过简单地浸泡钯前驱体的方法，所合成的二维H-MOF纳米片可以作为固定钯纳米颗粒的基底，从而获得无表面活性剂的钯催化剂。结合H-MOF-5独特的结构和气体吸附能力，Pd-H-MOF-5催化剂表现出优异的催化性能。
