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Efficient carbon dioxide hydrogenation to formic acid with buffering ionic liquids.

ABSTRACT: The efficient transformation of CO₂ into chemicals and fuels is a key challenge for the decarbonisation of the synthetic production chain. Formic acid (FA) represents the first product of CO₂ hydrogenation and can be a precursor of higher added value products or employed as a hydrogen storage vector. Bases are typically required to overcome thermodynamic barriers in the synthesis of FA, generating waste and requiring post-processing of the formate salts. The employment of buffers can overcome these limitations, but their catalytic performance has so far been modest. Here, we present a methodology utilising IL as buffers to catalytically transform CO₂ into FA with very high efficiency and comparable performance to the base-assisted systems. The combination of multifunctional basic ionic liquids and catalyst design enables the synthesis of FA with very high catalytic efficiency in TONs of >8*10⁵ and TOFs > 2.1*10⁴?h^-1.

SUBMITTER: Weilhard A

PROVIDER: S-EPMC7801478 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

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Efficient carbon dioxide hydrogenation to formic acid with buffering ionic liquids.

Weilhard Andreas A Argent Stephen P SP Sans Victor V

Nature communications 20210111 1

The efficient transformation of CO<sub>2</sub> into chemicals and fuels is a key challenge for the decarbonisation of the synthetic production chain. Formic acid (FA) represents the first product of CO<sub>2</sub> hydrogenation and can be a precursor of higher added value products or employed as a hydrogen storage vector. Bases are typically required to overcome thermodynamic barriers in the synthesis of FA, generating waste and requiring post-processing of the formate salts. The employment of b ...[more]

PMID: 33431835

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