Murialdo Maxwell, Weadock Nicholas J, Liu Yiqun, Ahn Channing C, Baker Sarah E, Landskron Kai, Fultz Brent
Lawrence Livermore National Laboratory, Livermore, California 94550, United States.
Department of Applied Physics and Materials Science, California Institute of Technology, Pasadena, California 91125, United States.
ACS Omega. 2019 Jan 7;4(1):444-448. doi: 10.1021/acsomega.8b03206. eCollection 2019 Jan 31.
We report that a porous, electron-rich, covalent, organonitridic framework (PECONF-4) exhibits an unusually high hydrogen uptake at 77 K, relative to its specific surface area. Chahine's rule, a widely cited heuristic for hydrogen adsorption, sets a maximum adsorptive uptake of 1 wt % hydrogen at 77 K per 500 m of the adsorbent surface area. High-pressure hydrogen adsorption measurements in a Sieverts apparatus showed that PECONF-4 exceeds Chahine's rule by 50%. The Brunauer-Emmett-Teller (BET) specific surface area of PECONF-4 was measured redundantly with nitrogen, argon, and carbon dioxide and found to be between 569 ± 2 and 676 ± 13 m g. Furthermore, hydrogen on PECONF-4 has a high heat of adsorption, in excess of 9 kJ mol.
我们报道了一种多孔、富电子、共价有机氮化物框架（PECONF-4），相对于其比表面积，在77K时表现出异常高的氢吸附量。Chahine规则是一种广泛引用的氢吸附经验法则，规定每500平方米吸附剂表面积在77K时氢的最大吸附量为1wt%。在Sieverts装置中进行的高压氢吸附测量表明，PECONF-4超出Chahine规则50%。用氮气、氩气和二氧化碳对PECONF-4的Brunauer-Emmett-Teller（BET）比表面积进行了多次测量，发现其在569±2至676±13平方米/克之间。此外，PECONF-4上的氢具有超过9kJ/mol的高吸附热。
