Volume 64, Issue 24 e202503003
Research Article

Plastic from CO2, Water, and Electricity: Tandem Electrochemical CO2 Reduction and Thermochemical Ethylene-CO Copolymerization

Maxim Zhelyabovskiy

Maxim Zhelyabovskiy

Department of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125 USA

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Hyuk-Joon Jung

Hyuk-Joon Jung

Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, CA, 90095 USA

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Paula L. Diaconescu

Paula L. Diaconescu

Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, CA, 90095 USA

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Jonas C. Peters

Corresponding Author

Jonas C. Peters

Department of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125 USA

E-mail: [email protected]; [email protected]

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Theodor Agapie

Corresponding Author

Theodor Agapie

Department of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, 91125 USA

E-mail: [email protected]; [email protected]

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First published: 07 April 2025

Graphical Abstract

A new system of generating entirely CO2-generated abiotic polymers by integrating electrochemical CO2 reduction (eCO2R) and organometallic polymerization catalysis is presented, having an overall CO2-to-polymer conversion of 14% and current-to-polymer efficiency of 51%. A strategy for tuning the product composition obtained from eCO2R by combining different electrocatalysts is introduced. CO-ethylene copolymerization activity in the presence of potential poisons from eCO2R is retained.

Abstract

Converting CO2 into industrially useful products is an appealing strategy for utilization of an abundant chemical resource. Electrochemical CO2 reduction (eCO2R) offers a pathway to convert CO2 into CO and ethylene, using renewable electricity. These products can be efficiently copolymerized by organometallic catalysts to generate polyketones. However, the conditions for these reactions are very different, presenting the challenge of coupling microenvironments typically encountered for the transformation of CO2 into highly complex but desirable multicarbon products. Herein, we present a system to produce polyketone plastics entirely derived from CO2 and water, where both the CO and C2H4 intermediates are produced by eCO2R. In this system, a combination of Cu and Ag gas diffusion electrodes is used to generate a gas mixture with nearly equal concentrations of CO and C2H4, and a recirculatory CO2 reduction loop is used to reach concentrations of above 11% each, leading to a current-to-polymer efficiency of up to 51% and CO2 utilization of 14%.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the Supporting Information of this article.

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