Jeong Uiseok, Kim HyeonJi, Ramesh Sreerangappa, Dogan Nesibe A, Wongwilawan Sirinapa, Kang Sungsu, Park Jungwon, Cho Eun Seon, Yavuz Cafer T
Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.
Graduate School of EEWS, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.
Angew Chem Int Ed Engl. 2021 Oct 4;60(41):22478-22486. doi: 10.1002/anie.202109215. Epub 2021 Sep 7.
Ordered mesoporous carbon materials offer robust network of organized pores for energy storage and catalysis applications, but suffer from time-consuming and intricate preparations hindering their widespread use. Here we report a new and rapid synthetic route for a N-doped ordered mesoporous carbon structure through a preferential heating of iron oxide nanoparticles by microwaves. A nanoporous covalent organic polymer is first formed in situ covering the hard templates of assembled nanoparticles, paving the way for a long-range order in a carbonaceous nanocomposite precursor. Upon removal of the template, a well-defined cubic mesoporous carbon structure was revealed. The ordered mesoporous carbon was used in solid state hydrogen storage as a host scaffold for NaAlH , where remarkable improvement in hydrogen desorption kinetics was observed. The state-of-the-art lowest activation energy of dehydrogenation as a single step was attributed to their ordered pore structure and N-doping effect.
有序介孔碳材料为储能和催化应用提供了坚固的有序孔道网络，但由于制备过程耗时且复杂，阻碍了它们的广泛应用。在此，我们报告了一种通过微波优先加热氧化铁纳米颗粒来合成氮掺杂有序介孔碳结构的新的快速合成路线。首先原位形成一种纳米多孔共价有机聚合物，覆盖组装纳米颗粒的硬模板，为含碳纳米复合前驱体中的长程有序排列铺平道路。去除模板后，呈现出明确的立方介孔碳结构。该有序介孔碳被用作固态储氢中NaAlH的主体支架，在其中观察到氢解吸动力学有显著改善。作为单步脱氢的目前最低活化能归因于其有序的孔结构和氮掺杂效应。
