Electrochemical reaction of CO2 to CO on a catalyst coated cation exchange membrane enabled by ammonium proton shuttling
Reinisch D, Reichbauer T, Vetter KM, Martic N, Schmid G, Mayrhofer KJJ (2022)
Publication Type: Journal article
Publication year: 2022
Journal
DOI: 10.1039/d2cy00878e
Abstract
CO2 reduction (CO2RR) can convert CO2 into feedstock for the chemical industry. In aqueous CO2 electrolysis a key challenge is how to combine the CO2 educt with a neutral or alkaline electrolyte and achieve a stable cell operation. We propose a novel cell design and operation mode based on a catalyst coated cation exchange membrane: a cationic acid (NH4+), with a volatile conjugate base (NH3), replaces the protons usually present for ion transport. The approach avoids a high proton concentration at the cathode catalyst while still removing all products within the gas phase. In this paper different cell concepts are investigated to identify a pathway to a stable, efficient and scalable operation mode. In a completely novel cell design a FECO > 50% was already maintained for over 35 h at 50 mA cm(-2), and at 200 mA cm(-2) a cell voltage of 3.6 V (FECO > 60%) was achieved. Surprisingly, ammonium oxidation at the anode was fully supressed under the reaction conditions.
Involved external institutions
Germany (DE)How to cite
APA:
Reinisch, D., Reichbauer, T., Vetter, K.M., Martic, N., Schmid, G., & Mayrhofer, K.J.J. (2022). Electrochemical reaction of CO2 to CO on a catalyst coated cation exchange membrane enabled by ammonium proton shuttling. Catalysis: Science and Technology. https://dx.doi.org/10.1039/d2cy00878e
MLA:
Reinisch, D., et al. "Electrochemical reaction of CO2 to CO on a catalyst coated cation exchange membrane enabled by ammonium proton shuttling." Catalysis: Science and Technology (2022).
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