Enhanced CO2 sorption in a hybrid PEI–Mo oxide film via pulsed electrodeposition

Abstract

Solid sorbents for carbon dioxide (CO₂) capture remain both a scientifically challenging and a technologically important area of work. The use of the right material and the understanding of its microstructure are critical for boosting the sorption performance. In this work, we show that the incorporation of PEI in Mo oxide via the introduction of a rejection potential in pulsed electrodeposition can create a hybrid film with an enhanced CO₂ sorption performance. By controlling the PEI incorporation and studying the interaction between PEI and Mo oxide, we suggest that the improvements seen can be attributed to the role of PEI as an active surfactant for CO₂ sorption, enabling the enhanced microstructure and the resultant CO₂ sorption performance.