Scrutinizing the CO Chemical Capture Path in Li2MnO3 Samples with Different Microstructural Properties

Hydrothermal and ball-milling procedures combined with the solid-state reaction method were proposed as alternative synthesis routes to modify microstructural Li2MnO3 powders. All these materials were compared against Li2MnO3 prepared by following the solid-state reaction method only. To totally understand the effect of the synthesis routes proposed, the modified samples were structurally and microstructurally analyzed and subsequently subjected to the CO chemisorption process. Li2MnO3-modified samples exhibited important differences and improvements during the CO chemisorption process, in comparison to the powders obtained through the solid-state reaction method, associated with important variations on their microstructural features. Specifically, the sample prepared by the hydrothermal bottom-up approach and labeled as HSS700 showed the best CO chemisorption. This result was explained based on its crystal and particle sizes, morphology, and specific surface area. Moreover, the whole analysis performed on all the samples allowed one to determine that the solid-gas interphase controls the CO chemisorption over the CO-Li2MnO3 kinetics.

Automated summary

Hydrothermal and ball-milling procedures combined with the solid-state reaction method were proposed as alternative synthesis routes to modify microstructural Li2MnO3 powders. The modified Li2MnO3 samples exhibited improved CO chemisorption performance due to changes in their microstructural features. Among the samples, the one prepared by the hydrothermal method (HSS700) showed the best CO chemisorption performance, which was attributed to its crystal and particle sizes, morphology, and specific surface area.