Utilizing Formate as an Energy Carrier by Coupling CO 2 Electrolysis with Fuel Cell Devices

Abstract Electrochemical reduction of CO 2 to useful chemicals can change the role of CO 2 from harmful waste to a valuable feedstock. Despite a lot of progress in the alkaline electrochemical conversion of CO 2 to formate, there is still a lack of potential applications for the generated aqueous fo...

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Published inChemie ingenieur technik Vol. 91; no. 6; pp. 872 - 882
Main Authors Bienen, Fabian, Kopljar, Dennis, Löwe, Armin, Aßmann, Pia, Stoll, Marvin, Rößner, Paul, Wagner, Norbert, Friedrich, Andreas, Klemm, Elias
Format Journal Article
LanguageEnglish
Published 01.06.2019
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Summary:Abstract Electrochemical reduction of CO 2 to useful chemicals can change the role of CO 2 from harmful waste to a valuable feedstock. Despite a lot of progress in the alkaline electrochemical conversion of CO 2 to formate, there is still a lack of potential applications for the generated aqueous formate solution. Here, the general ability of formate to be used as an energy or hydrogen carrier is discussed and compared to well‐known energy storage chemicals. Concepts to employ formate solution as an energy carrier by combining CO 2 electrolysis with the reconversion of formate into electricity via a direct formate fuel cell or catalytic decomposition to H 2 combined with a proton exchange membrane fuel cell are demonstrated.
ISSN:0009-286X
1522-2640
DOI:10.1002/cite.201800212