A Microporous Bimetallic Aluminum-Copper-Carboxylate-Pyrazolate MOF for CO2 Capture

04 June 2025, Version 1

Abstract

Herein, we present a novel bimetallic hetero-functional ultra-microporous MOF, labelled MIP-212(Al/Cu) (MIP stands for Materials from Institute of Porous Materials of Paris), designed based on Hard and Soft Acids and Bases (HSAB) principle. This MOF is constructed from Al3+ and Cu2+ ions together with the carboxylate-pyrazolate ligand (PyC), that endows the structure with two types of narrow tunnel-like pores decorated with either μ2-OH groups or Cu(II) open metal sites. While the structure shows a slight breathing behaviour depending on pore’s content, the confinement effect, in combination with open metal sites generated upon activation, leads to a remarkably high CO2 uptake capacity at ambient temperature and low pressure (ca. 2.30 mmol/g at 0.15 bar), comparable to benchmark MOFs, with a good CO2/N2 IAST estimated selectivity of ca. 30 at 1 bar. The calculated Qst (CO2) of -36.8 kJ·mol-1 suggests a relatively low energy demand for its regeneration process. Finally, dynamic breakthrough measurements conducted under binary gas mixture conditions of CO2:N2 (15:85) prompts MIP-212(Al/Cu) as a promising post-combustion CO2 capture adsorbent, when employed in a typical temperature swing adsorption (TSA) process, as predicted by process, techno-economics and environmental Key Performance Indicators

Keywords

MOF
heterometallic
CO2 capture

Supplementary materials

Title
Description
Actions
Title
Supplementary Information
Description
Details on experimental data
Actions

Comments

Comments are not moderated before they are posted, but they can be removed by the site moderators if they are found to be in contravention of our Commenting Policy [opens in a new tab] - please read this policy before you post. Comments should be used for scholarly discussion of the content in question. You can find more information about how to use the commenting feature here [opens in a new tab] .
This site is protected by reCAPTCHA and the Google Privacy Policy [opens in a new tab] and Terms of Service [opens in a new tab] apply.