MOF-Derived Robust and Synergetic Acid Sites Inducing C-N Bond Disruption for Energy-Efficient CO2Desorption

Lei Xing, Meng Li, Mingyue Li, Teng Xu, Yuchen Li, Tieyue Qi, Huanxin Li, Zhigang Hu, Guang Ping Hao, Shihan Zhang, Tony David James, Boyang Mao, Lidong Wang

Research output: Contribution to journalArticlepeer-review

Abstract

Amine-based scrubbing technique is recognized as a promising method of capturing CO2 to alleviate climate change. However, the less stability and poor acidity of solid acid catalysts (SACs) limit their potential to further improve amine regeneration activity and reduce the energy penalty. To address these challenges, here, we introduce two-dimensional (2D) cobalt-nitrogen-doped carbon nanoflakes (Co-N-C NSs) driven by a layered metal-organic framework that work as SACs. The designed 2D Co-N-C SACs can exhibit promising stability, superhydrophilic surface, and acidity. Such 2D structure also contains well-confined Co-N4 Lewis acid sites and -OH Brønsted acid sites to have a synergetic effect on C-N bond disruption and significantly increase CO2 desorption rate by 281% and reduce the reaction temperatures to 88 °C, minimizing water evaporation by 20.3% and subsequent regeneration energy penalty by 71.7% compared to the noncatalysis.

Original languageEnglish
Pages (from-to)17936-17945
Number of pages10
JournalEnvironmental Science and Technology
Volume56
Issue number24
DOIs
Publication statusPublished - 20 Dec 2022

Keywords

  • 2D nanoflakes
  • COcapture
  • energy efficiency
  • MEA regeneration
  • solid acid catalyst

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

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