Park Sangyeup, Kim Jong Gyeong, Cho Youngin, Pak Chanho
Graduate School of Energy Convergence, Institute of Integrated Technology, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea.
Nanomaterials (Basel). 2025 Jan 16;15(2):128. doi: 10.3390/nano15020128.
Zeolitic imidazolate framework-8 (ZIF-8) has been extensively studied as a precursor for nitrogen-doped carbon (NC) materials due to its high surface area, tunable porosity, and adjustable nitrogen content. However, the intrinsic microporous structure of the ZIF-8 limits mass transport and accessibility of reactants to active sites, reducing its effectiveness in electrochemical applications. In this study, a soft templating approach using a triblock copolymer was used to prepare mesoporous ZIF-8-derived NC (Meso-ZIF-NC) samples. The hierarchical porous structure was investigated by varying the ratios of Pluronic F-127, NaClO, and toluene. The resulting Meso-ZIF-NC exhibited widespread pore size distribution with an enhanced mesopore (2-50 nm) volume according to the composition of the reaction mixtures. Pt nanoparticles were uniformly dispersed on the Meso-ZIF-NC to form Pt/Meso-ZIF-NC catalysts, which presented a high electrochemical surface area and improved oxygen reduction reaction activity. The study highlights the important role of mesopore structure and nitrogen doping in enhancing catalytic performance, providing a pathway for advanced fuel cell catalyst design.
沸石咪唑酯骨架结构材料-8（ZIF-8）因其高比表面积、可调节的孔隙率和可调整的氮含量，作为氮掺杂碳（NC）材料的前驱体受到了广泛研究。然而，ZIF-8的固有微孔结构限制了传质以及反应物到达活性位点的可及性，降低了其在电化学应用中的效能。在本研究中，采用了一种使用三嵌段共聚物的软模板法来制备介孔ZIF-8衍生的NC（Meso-ZIF-NC）样品。通过改变普朗尼克F-127、NaClO和甲苯的比例来研究分级多孔结构。根据反应混合物的组成，所得的Meso-ZIF-NC呈现出广泛的孔径分布，其中介孔（2-50纳米）体积有所增加。铂纳米颗粒均匀分散在Meso-ZIF-NC上以形成Pt/Meso-ZIF-NC催化剂，该催化剂具有高电化学表面积并提高了氧还原反应活性。该研究突出了介孔结构和氮掺杂在增强催化性能方面的重要作用，为先进燃料电池催化剂的设计提供了一条途径。
