Cascade CO2 electroreduction enables efficient carbonate-free production of ethylene

Ozden, Adnan; Wang, Yuhang; Li, Fengwang; Luo, Mingchuan; Sisler, Jared; Thevenon, Arnaud; Rosas‐Hernández, Alonso; Burdyny, Thomas; Lum, Yanwei; Yadegari, Hossein; Agapie, Theodor; Peters, Jonas C.; Sargent, Edward H.; Sinton, David

doi:10.1016/j.joule.2021.01.007

Cited by 231 publications

(201 citation statements)

References 36 publications

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“…To this end, Ozden and co‐workers prototyped a CO 2  CO  C 2+ tandem consisting of a solid oxide electrochemical cell (SOEC) and an MEA (Figure 11B). 103 The SOEC reduces CO 2 to CO at near‐unity Faradaic efficiencies and current densities of more than 500 mA cm −2 . The highest CO concentration at the outlet can reach 45%.…”

Section: Newly Emerged Gde‐based Reactorsmentioning

confidence: 99%

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Valorizing carbon dioxide via electrochemical reduction on gas‐diffusion electrodes

Luo

Zhang

et al. 2021

InfoMat

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The electrochemical carbon dioxide (CO2) reduction provides a means to upgrade CO2 into value‐added chemicals. When powered by renewable electricity, CO2 electroreduction holds the promise of chemical manufacturing with carbon neutrality. A commercially relevant CO2 electroreduction process should be highly selective and productive toward desired products, energetically efficient for power conversion, and stable for long‐term operation. To achieve these goals, designing gas‐diffusion catalytic electrodes and prototyping reactors built upon in‐depth understandings of the reaction mechanisms are of paramount importance. In this review, the fundamentals of gas‐diffusion electrodes are briefly presented. Then, the most recent advances in developing high‐performance CO2 reduction using gas‐diffusion electrodes are overviewed. Reactor engineering aiming at enhancing productivity, energy efficiency, CO2 single‐pass utilization, and operating lifetime is further discussed. Challenges in developing CO2 electroreduction systems are included. The prospects for advancing CO2 electroreduction toward practical applications are also narrated.

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Section: Newly Emerged Gde‐based Reactorsmentioning

confidence: 99%

Section: Newly Emerged Gde‐based Reactorsmentioning

confidence: 99%

Valorizing carbon dioxide via electrochemical reduction on gas‐diffusion electrodes

Luo

Zhang

et al. 2021

InfoMat

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“…1 H NMR(400 MHz, CDCl 3 , see Supplementary Fig. 14) 4,8,11,15,18,22,. This precursor was synthesized using the same procedure.…”

Section: Syntheses Of Chemicals and Catalystsmentioning

confidence: 99%

“…The use of CO as a reagent (instead of CO 2 ) can produce the same carbon-containing products as CO2RR electrolysis while bypassing the formation of (bi)carbonates that reduce both the efficiency and durability of a flow cell. [10][11][12] An additional advantage of CO reduction reaction (CORR) electrolysis is that the process saturates the electrocatalyst surface with adsorbed CO (*CO), 13,14 which increases the probability of carbon-carbon coupling to form multi-carbon (C 2+ ) products. 15,16 This ability to favor carbon-carbon bond formation reaction chemistry is appealing because C 2+ products are generally more economically valuable than the C 1 products (e.g., CO, HCOOH) that are more readily produced by CO2RR electrolysis.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalysts derived from copper complexes transform CO into C2+ products effectively in a flow cell

Ren

Zhang

Lees

et al. 2021

Preprint

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The highest performance flow cells capable of electrolytically converting CO2 into higher value chemicals and fuels pass a concentrated hydroxide electrolyte across the cathode. A major problem for CO2 electrolysis is that this strongly alkaline medium converts the majority of CO2 into unreactive HCO3– and CO32– rather than CO2 reduction reaction (CO2RR) products. The electrolysis of CO (instead of CO2) does not suffer from this same problem because CO does not react with hydroxide. Moreover, CO can be more readily converted into products containing two or more carbon atoms (i.e., C2+ products). While several solid-state electrocatalysts have proven competent at converting CO into C2+ products, we demonstrate here that molecular electrocatalysts are also effective at mediating this transformation in a flow cell. Using a molecular copper phthalocyanine (CuPc) electrocatalyst, CO was electrolyzed into C2+ products at high rates of product formation (i.e., current densities J ≥200 mA/cm2), and at high Faradaic efficiencies for C2+ production (FEC2+; 72% at 200 mA/cm2). These findings present a new class of electrocatalysts for making carbon-neutral chemicals and fuels.

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“…A better solution is to convert carbon dioxide to carbon monoxide using techniques that can avoid the loss of carbon dioxide. Such a cascaded reaction was performed by first using a high temperature solid oxide fuel cell to electrochemically split and remove the oxygen from the carbon dioxide 185. The carbon monoxide was then fed to a membrane electrolyzer assembly with copper cathode for conversion to ethylene with no loss of carbon dioxide to carbonate with a total energy input of ∼138 GJ (ton C 2 H 4 ) −1 , a saving of some 48 % when compared with the direct route.…”

Section: Cascaded Reduction Of Carbon Dioxidementioning

confidence: 99%

Process Parameters in the Electrochemical Reduction of Carbon Dioxide to Ethylene

Sturman

Oelgemöller

2021

ChemBioEng Reviews

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Ethylene is one of the most widely used chemical compounds. It is readily transformed to a variety of useful products that can replace those derived from fossil sources. Further, the ability to produce ethylene from atmospheric carbon dioxide would significantly assist in the urgent need to stabilize, and ultimately to reduce, the concentration of greenhouse gases in the atmosphere. This review covers the electrochemical reduction of carbon dioxide at copper‐based cathodes. The direct production of ethylene is the focus of the review, but it is also relevant to include the important ethylene precursor and intermediate in the carbon dioxide reduction reaction, carbon monoxide. Carbon monoxide can be reduced to ethylene on a copper cathode under similar conditions to carbon dioxide. Ethanol is another potential product of the reduction of carbon dioxide at a copper cathode. It can be readily dehydrated to ethylene, further enhancing the overall yield of ethylene. The aim of the review is to show that there are many interacting parameters that influence the effectiveness and efficiency of the electrochemical reduction of carbon dioxide at copper‐based cathodes.

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Cascade CO2 electroreduction enables efficient carbonate-free production of ethylene

Cited by 231 publications

References 36 publications

Valorizing carbon dioxide via electrochemical reduction on gas‐diffusion electrodes

Valorizing carbon dioxide via electrochemical reduction on gas‐diffusion electrodes

Electrocatalysts derived from copper complexes transform CO into C2+ products effectively in a flow cell

Process Parameters in the Electrochemical Reduction of Carbon Dioxide to Ethylene

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