Volume 91, Issue 6 pp. 872-882
Research Article

Utilizing Formate as an Energy Carrier by Coupling CO2 Electrolysis with Fuel Cell Devices

Fabian Bienen

Fabian Bienen

German Aerospace Center (DLR), Institute of Engineering Thermodynamics, Pfaffenwaldring 38 – 40, 70569 Stuttgart, Germany

These authors contributed equally.

Search for more papers by this author
Dennis Kopljar

Corresponding Author

Dennis Kopljar

German Aerospace Center (DLR), Institute of Engineering Thermodynamics, Pfaffenwaldring 38 – 40, 70569 Stuttgart, Germany

These authors contributed equally.

Correspondence: Dennis Kopljar ([email protected]), German Aerospace Center (DLR), Institute of Engineering Thermodynamics, Pfaffenwaldring 38 – 40, 70569 Stuttgart, Germany.Search for more papers by this author
Armin Löwe

Armin Löwe

University of Stuttgart, Institute of Chemical Technology, Pfaffenwaldring 55, 70569 Stuttgart, Germany

These authors contributed equally.

Search for more papers by this author
Pia Aßmann

Pia Aßmann

German Aerospace Center (DLR), Institute of Engineering Thermodynamics, Pfaffenwaldring 38 – 40, 70569 Stuttgart, Germany

Search for more papers by this author
Marvin Stoll

Marvin Stoll

University of Stuttgart, Institute of Chemical Technology, Pfaffenwaldring 55, 70569 Stuttgart, Germany

Search for more papers by this author
Paul Rößner

Paul Rößner

University of Stuttgart, Institute of Chemical Technology, Pfaffenwaldring 55, 70569 Stuttgart, Germany

Search for more papers by this author
Norbert Wagner

Norbert Wagner

German Aerospace Center (DLR), Institute of Engineering Thermodynamics, Pfaffenwaldring 38 – 40, 70569 Stuttgart, Germany

Search for more papers by this author
Andreas Friedrich

Andreas Friedrich

German Aerospace Center (DLR), Institute of Engineering Thermodynamics, Pfaffenwaldring 38 – 40, 70569 Stuttgart, Germany

Search for more papers by this author
Elias Klemm

Elias Klemm

University of Stuttgart, Institute of Chemical Technology, Pfaffenwaldring 55, 70569 Stuttgart, Germany

Search for more papers by this author
First published: 07 May 2019
Citations: 31

Abstract

Electrochemical reduction of CO2 to useful chemicals can change the role of CO2 from harmful waste to a valuable feedstock. Despite a lot of progress in the alkaline electrochemical conversion of CO2 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 CO2 electrolysis with the reconversion of formate into electricity via a direct formate fuel cell or catalytic decomposition to H2 combined with a proton exchange membrane fuel cell are demonstrated.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.