Electrolysis of Gaseous CO2 to CO in a Flow Cell with a Bipolar Membrane

Danielle A. Salvatore, David M. Weekes, Jingfu He, Kevan E. Dettelbach, Yuguang C. Li, Thomas E. Mallouk, Curtis P. Berlinguette

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

The conversion of CO2 to CO is demonstrated in an electrolyzer flow cell containing a bipolar membrane at current densities of 200 mA/cm2 with a Faradaic efficiency of 50%. Electrolysis was carried out by delivering gaseous CO2 at the cathode with a silver catalyst integrated in a carbon-based gas diffusion layer. Nonprecious nickel foam in a strongly alkaline electrolyte (1 M NaOH) was used to mediate the anode reaction. While a configuration where the anode and cathode were separated by only a bipolar membrane was found to be unfavorable for robust CO2 reduction, a modified configuration with a solid-supported aqueous layer inserted between the silver-based catalyst layer and the bipolar membrane enhanced the cathode selectivity for CO2 reduction to CO. We report higher current densities (200 mA/cm2) than previously reported for gas-phase CO2 to CO electrolysis and demonstrate the dependence of long-term stability on adequate hydration of the CO2 inlet stream.

Original languageEnglish (US)
Pages (from-to)149-154
Number of pages6
JournalACS Energy Letters
Volume3
Issue number1
DOIs
StatePublished - Jan 12 2018

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Carbon Monoxide
Electrolysis
Cathodes
Membranes
Silver
Anodes
Current density
Catalysts
Diffusion in gases
Nickel
Hydration
Electrolytes
Foams
Carbon
Gases

All Science Journal Classification (ASJC) codes

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

Cite this

Salvatore, D. A., Weekes, D. M., He, J., Dettelbach, K. E., Li, Y. C., Mallouk, T. E., & Berlinguette, C. P. (2018). Electrolysis of Gaseous CO2 to CO in a Flow Cell with a Bipolar Membrane. ACS Energy Letters, 3(1), 149-154. https://doi.org/10.1021/acsenergylett.7b01017
Salvatore, Danielle A. ; Weekes, David M. ; He, Jingfu ; Dettelbach, Kevan E. ; Li, Yuguang C. ; Mallouk, Thomas E. ; Berlinguette, Curtis P. / Electrolysis of Gaseous CO2 to CO in a Flow Cell with a Bipolar Membrane. In: ACS Energy Letters. 2018 ; Vol. 3, No. 1. pp. 149-154.
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Salvatore, DA, Weekes, DM, He, J, Dettelbach, KE, Li, YC, Mallouk, TE & Berlinguette, CP 2018, 'Electrolysis of Gaseous CO2 to CO in a Flow Cell with a Bipolar Membrane', ACS Energy Letters, vol. 3, no. 1, pp. 149-154. https://doi.org/10.1021/acsenergylett.7b01017

Electrolysis of Gaseous CO2 to CO in a Flow Cell with a Bipolar Membrane. / Salvatore, Danielle A.; Weekes, David M.; He, Jingfu; Dettelbach, Kevan E.; Li, Yuguang C.; Mallouk, Thomas E.; Berlinguette, Curtis P.

In: ACS Energy Letters, Vol. 3, No. 1, 12.01.2018, p. 149-154.

Research output: Contribution to journalArticle

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AU - Weekes, David M.

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AB - The conversion of CO2 to CO is demonstrated in an electrolyzer flow cell containing a bipolar membrane at current densities of 200 mA/cm2 with a Faradaic efficiency of 50%. Electrolysis was carried out by delivering gaseous CO2 at the cathode with a silver catalyst integrated in a carbon-based gas diffusion layer. Nonprecious nickel foam in a strongly alkaline electrolyte (1 M NaOH) was used to mediate the anode reaction. While a configuration where the anode and cathode were separated by only a bipolar membrane was found to be unfavorable for robust CO2 reduction, a modified configuration with a solid-supported aqueous layer inserted between the silver-based catalyst layer and the bipolar membrane enhanced the cathode selectivity for CO2 reduction to CO. We report higher current densities (200 mA/cm2) than previously reported for gas-phase CO2 to CO electrolysis and demonstrate the dependence of long-term stability on adequate hydration of the CO2 inlet stream.

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Salvatore DA, Weekes DM, He J, Dettelbach KE, Li YC, Mallouk TE et al. Electrolysis of Gaseous CO2 to CO in a Flow Cell with a Bipolar Membrane. ACS Energy Letters. 2018 Jan 12;3(1):149-154. https://doi.org/10.1021/acsenergylett.7b01017