Calcium Oxide: Multishelled CaO Microspheres Stabilized by Atomic Layer Deposition of Al2O3 for Enhanced CO2 Capture Performance (Adv. Mater. 41/2017)

Multishelled CaO microspheres coated with an atomic-layer-deposition-grown Al₂O₃ layer yield high-capacity CO₂ sorbents with improved cyclic stability, as demonstrated by Christoph R. Müller and co-workers in article number 1702896. The central void formed by the removal of the carbonaceous template accommodates the large volumetric changes of the material during cyclic operation, whereas the porous shells composed of Al₂O₃-coated CaO nanoparticles reduce diffusive transport limitations through the growing product layer of CaCO₃ and improve the thermal stability of the sorbent.

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