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Multiple C-C bond formation upon electrocatalytic reduction of CO₂ by an iron-based molecular macrocycle.

ABSTRACT: Molecular macrocycles are very promising electrocatalysts for the reduction of carbon dioxide into value-added chemicals. Up to now, most of these catalysts produced only C₁ products. We report here that iron phthalocyanine, a commercially available molecule based on earth-abundant elements, can produce light hydrocarbons upon electrocatalytic reduction of CO₂ in aqueous conditions and neutral pH. Under applied electrochemical potential, C₁ to C₄ saturated and unsaturated products are evolved. Isotopic labelling experiments unambiguously show that these products stem from CO₂. Control experiments and in situ X-ray spectroscopic analysis show that the molecular catalyst remains intact during catalysis and is responsible for the reaction. On the basis of experiments with alternate substrates, a mechanism is proposed for the C-C bond formation step.

SUBMITTER: Dong ST

PROVIDER: S-EPMC9847672 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature

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Multiple C-C bond formation upon electrocatalytic reduction of CO2 by an iron-based molecular macrocycle.

Dong Si-Thanh ST Xu Chen C Lassalle-Kaiser Benedikt B

Chemical science 20221215 3

Molecular macrocycles are very promising electrocatalysts for the reduction of carbon dioxide into value-added chemicals. Up to now, most of these catalysts produced only C1 products. We report here that iron phthalocyanine, a commercially available molecule based on earth-abundant elements, can produce light hydrocarbons upon electrocatalytic reduction of CO2 in aqueous conditions and neutral pH. Under applied electrochemical potential, C1 to C4 satur ...[more]

PMID: 36741521

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