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Rapid Access to Ordered Mesoporous Carbons for Chemical Hydrogen Storage
Angewandte Chemie International Edition ( IF 16.6 ) Pub Date : 2021-08-12 , DOI: 10.1002/anie.202109215
Uiseok Jeong 1 , HyeonJi Kim 1 , Sreerangappa Ramesh 2 , Nesibe A Dogan 3 , Sirinapa Wongwilawan 1 , Sungsu Kang 4 , Jungwon Park 4, 5 , Eun Seon Cho 1 , Cafer T Yavuz 1, 2, 6, 7
Affiliation  

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 NaAlH4, 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.

中文翻译:

快速获取用于化学储氢的有序介孔碳

有序介孔碳材料为能量存储和催化应用提供了强大的有组织孔网络,但由于耗时且复杂的制备过程阻碍了它们的广泛应用。在这里,我们报告了一种通过微波优先加热氧化铁纳米粒子来合成 N 掺杂有序介孔碳结构的新途径。首先在原位形成纳米多孔共价有机聚合物,覆盖组装纳米颗粒的硬模板,为碳质纳米复合材料前体的长程有序铺平了道路。去除模板后,显示出明确的立方介孔碳结构。有序介孔碳用于固态储氢作为 NaAlH 4的主体支架,其中观察到氢解吸动力学的显着改善。作为单个步骤的最先进的最低脱氢活化能归因于它们的有序孔结构和 N 掺杂效应。
更新日期:2021-09-27
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