Interfacial WOCo electronic bridge enhances proton transfer for efficient amine solution regeneration in CO2 capture

2026-06-17

PRE

Jia Xiong

Qiang Sun

Wuxin Liao

Zirui Wang

高

高红霞 (Hongxia Gao) *

梁志武 (Zhiwu Liang) *

DOI：10.1002/aic.70515

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Catalyst-aided amine regeneration represents a promising strategy to alleviate the high-energy-consumption bottleneck in CO2 capture. However, conventional solid acid catalysts possess limited proton-donating capacity and inferior electron transfer efficiency, making it challenging to realize efficient catalytic amine regeneration and reduced energy consumption. Herein, we in situ synthesize a WOCo bridged oxyhydroxide catalyst (CNT@WCo) on CNTs. The WOCo structure induces directional electron transfer from Co to W, polarizing hydroxyl groups and enhancing proton donation. The high conductivity of CNTs promotes efficient PCET, stabilizing the electron-deficient Co center and weakening the CN bond. CNT@WCo increases instantaneous CO2 desorption rate by 8.66 times and reduces relative heat duty by 59%, with excellent cyclic stability. In situ FTIR and DFT reveal strong carbamate adsorption, electron rearrangement, and CN bond elongation. The synergistic mechanism of W-mediated proton donation and CNT-governed PCET is established, providing theoretical and technical support for designing high-performance catalysts for energy-efficient CO2 capture.

Keywords:

catalytic solvent regeneration

CO2 capture

heat duty

metal oxyhydroxides

proton-coupled electron transfer

Interfacial WOCo electronic bridge enhances proton transfer for efficient amine solution regeneration in CO2 capture

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