DataVXACS Energy LettersPaper
journal article·2018-01-12

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

ACS Energy Letters· Volume 3· Issue 1
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Source abstract

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.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storageCatalysis & surfaces

OpenAlex topics: CO2 Reduction Techniques and Catalysts · Electrocatalysts for Energy Conversion · Advanced battery technologies research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemical & Biological Engineering, The University of British Columbia, 2360 East Mall, Vancouver, British Columbia V6T1Z3, Canada

Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T1Z1, Canada

Department of Chemistry, Department of Biochemistry and Molecular Biology, and Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States

Stewart Blusson Quantum Matter Institute, The University of British Columbia, 2355 East Mall, Vancouver, British Columbia, Canada V6T1Z4

Funding

Basic Energy Sciences · Canada Foundation for Innovation · Killam Trusts · Canada Research Chairs · Natural Sciences and Engineering Research Council of Canada · Canadian Institute for Advanced Research · Canada First Research Excellence Fund

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