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相关概念视频

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A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
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相关实验视频

Updated: May 16, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
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通过极化墙工程来有效储存的三维共价有机框架.

Jia Chen1, Zhuozhuo Tang1, Da Zhu1

  • 1Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China.

Nano letters
|April 3, 2025
PubMed
概括

共价有机框架 (COFs) 显示出对储存的前景. 3D-F-COF中的极化孔壁增强了吸附热量和吸收,提供了稳定高效的存储解决方案.

关键词:
化法 化法 化法储存的储存的储存.极化墙壁工程 极化墙壁工程吸附热是一种吸附热.三维的共价有机框架.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 化学工程是化学工程的重要组成部分.
  • 纳米技术 纳米技术

背景情况:

  • 联有机框架 (COF) 具有较高的表面积和可调节的孔隙,使其对 (H 2) 储存具有吸引力.
  • 当前的COF与H2的相互作用较弱,限制了它们的吸附热和总体储存能力.
  • 提高H2吸附热对于提高基于COF的H2储存材料的效率至关重要.

研究的目的:

  • 通过极化壁的修改来设计具有增强H2吸附性质的COF.
  • 为了研究加入对COF孔隙结构中的H2相互作用的影响.
  • 评估修改后的COF的H2吸收能力和循环稳定性.

主要方法:

  • 三维COF与含的孔壁的合成 (3D-F-COF).
  • 描述COF的结构和化学特性.
  • 在低温温度 (77 K) 和高压 (90 bar) 下测量H 2 吸附异热体.

主要成果:

  • 在3D-F-COF的孔壁上的基组会产生极化区域,增强H2吸附热量.
  • 3D-F-COF材料在77K和90bar时实现了5.96%的总H2吸收.
  • H2吸附增强归因于物理吸附,没有化学吸附的证据,并且材料显示出出色的循环稳定性.

结论:

  • 结合基组的极化墙体工程是一种有效的策略,可以增加COF中的H2吸附热量.
  • 这种方法可以显著提高COF中的H2吸收能力,而不会损害材料的稳定性.
  • 通过极群结合调节吸附热,为开发先进的多孔材料提供了有前途的途径,用于高效的H2存储.