Correlating oxygen mobility with thermochemical CO-splitting efficiency in A-site substituted manganite perovskites

The effect of lattice geometric parameters of perovskite oxides on thermochemical redox CO 2 -splitting process is highlighted. Experimentally-derived amounts of O 2 and CO evolved were found to correlate with critical radius per unit cell volume ( R c.u ) and specific free volume ( V F.S ), respect...

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Published in:Sustainable energy & fuels 2021-09, Vol.5 (18), p.457-4574
Main Authors: Nair, Mahesh Muraleedharan, Abanades, Stéphane
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Summary:The effect of lattice geometric parameters of perovskite oxides on thermochemical redox CO 2 -splitting process is highlighted. Experimentally-derived amounts of O 2 and CO evolved were found to correlate with critical radius per unit cell volume ( R c.u ) and specific free volume ( V F.S ), respectively, in a series of phase pure A-site substituted perovskites. These findings demonstrate the possibility of designing new oxygen carrier materials based on geometric parameters while predicting their CO 2 -splitting activity during two-step cycles. Geometric parameters influence the thermochemical redox properties of A-site substituted perovskite oxygen carriers.
ISSN:2398-4902
DOI:10.1039/d1se00950h