Microstructural Activation of a Topochemical Reduction Reaction.

ABSTRACT: The progress of the topochemical reduction reaction that converts LaSrNiRuO₆ into LaSrNiRuO₄ depends on the synthesis conditions used to prepare the oxidized phase. Samples of LaSrNiRuO₆ that have been quenched from high temperature can be readily and rapidly converted into LaSrNiRuO₄. In contrast, samples that have been slow-cooled cannot be completely reduced. This reactivity difference is attributed to the differing microstructures of the quenched and slow-cooled samples, with the former having much smaller average crystalline domain sizes and larger lattice strains than the latter. A mechanism to explain this effect is presented, in which the greater "plasticity" of small crystalline domains helps lower the activation energy of the reduction

SUBMITTER: Liang Z 

PROVIDER: S-EPMC9954294 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature