Transforming atmospheric CO2 into alternative fuels: a metal-free approach under ambient conditions

Chandra Sau, Samaresh ; Bhattacharjee, Rameswar ; Hota, Pradip Kumar ; Vardhanapu, Pavan K. ; Vijaykumar, Gonela ; Govindarajan, R. ; Datta, Ayan ; Mandal, Swadhin K. (2019) Transforming atmospheric CO2 into alternative fuels: a metal-free approach under ambient conditions Chemical Science, 10 (6). pp. 1879-1884. ISSN 2041-6520

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Official URL: http://doi.org/10.1039/C8SC03581D

Related URL: http://dx.doi.org/10.1039/C8SC03581D

Abstract

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.

Item Type:Article
Source:Copyright of this article belongs to Royal Society of Chemistry.
ID Code:118273
Deposited On:19 May 2021 14:22
Last Modified:19 May 2021 14:22

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