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High-Pressure Hydrogen Adsorption on a Porous Electron-Rich Covalent Organonitridic Framework.

ABSTRACT: 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 m² 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 m² g^-1. Furthermore, hydrogen on PECONF-4 has a high heat of adsorption, in excess of 9 kJ mol^-1.

SUBMITTER: Murialdo M

PROVIDER: S-EPMC6648737 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature

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High-Pressure Hydrogen Adsorption on a Porous Electron-Rich Covalent Organonitridic Framework.

Murialdo Maxwell M Weadock Nicholas J NJ Liu Yiqun Y Ahn Channing C CC Baker Sarah E SE Landskron Kai K Fultz Brent B

ACS omega 20190107 1

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<sup>2</sup> 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-T ...[more]

PMID: 31459342

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