Single-crystal 2D covalent organic frameworks for high-capacity methane storage
Year: 2026
Type: article
Abstract: 2D covalent organic frameworks (COFs) usually possess a polycrystalline nature as well as lower porosity and surface area than 3D counterparts, restraining their exploration over gas storage applications. Herein, a substituent strategy has been proposed and employed to generate three robust single-crystal 2D COFs isomers with atom-resolution structures determined by 3D electron diffraction. Among three isomers, a precise engineering of their interlayer distance affords the highest Brunauer−Emmett−Teller surface area of ~2100 m 2 g −1 and the largest pore volume of 1.40 cm 3 g −1 for the desolvated GZU-1. This COF shows the highest total volumetric methane uptake of 240 cm 3 (STP) cm −3 at 273 K and 100 bar among 2D COFs, even comparable with those for excellent 3D MOFs. This work not only delivers unique insight into the design of 2D single-crystal COFs by interlayer stacking regulation, but also promotes the application of highly porous 2D COFs in gas storage.
Source: Nature Communications
Institutions: Guizhou University, University of Science and Technology Beijing, École Nationale Supérieure de Chimie de Montpellier, Centre National de la Recherche Scientifique, Institut Universitaire de France, Université de Montpellier, Institut Charles Gerhardt Montpellier, Northeast Normal University, Fujian Normal University, Zhejiang Normal University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $6,990
OpenAlex ID: W7128796238