期刊
CHEMICAL SCIENCE
卷 10, 期 6, 页码 1879-1884出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8sc03581d
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资金
- IISER Kolkata
- UGC
- UGC, New Delhi
- SERB
- CSIR India
- INSA
- DST
- BRNS
This work demonstrates the first-ever completely metal-free approach to the capture of CO2 from air followed by reduction to methoxyborane (which produces methanol on hydrolysis) or sodium formate (which produces formic acid on hydrolysis) under ambient conditions. This was accomplished using an abnormal N-heterocyclic carbene (aNHC)-borane adduct. The intermediate involved in CO2 capture (aNHC-H, HCOO, B(OH)(3)) was structurally characterized by single-crystal X-ray diffraction. Interestingly, the captured CO2 can be released by heating the intermediate, or by passing this compound through an ion-exchange resin. The capture of CO2 from air can even proceed in the solid state via the formation of a bicarbonate complex (aNHC-H, HCO3, B(OH)(3)), which was also structurally characterized. A detailed mechanism for this process is proposed based on tandem density functional theory calculations and experiments.
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