Disentangling the size-dependent redox reactivity of iron oxides using thermodynamic relationships.

ABSTRACT: Nanoparticles often exhibit size-dependent redox reactivities, with smaller particles being more reactive in some cases, while less reactive in others. Predicting trends between redox reaction rates and particle sizes is often complicated because a particle's dimensions can simultaneously influence its aggregation state, reactive surface area, and thermodynamic properties. Here, we tested the hypothesis that interfacial redox reaction rates for nanoparticles with different sizes can be described with a single linear free-energy relationship (LFER) if size-dependent reactive surface areas and thermodynamic properties are properly considered. We tested this hypothesis using a well-known interfacial redox reaction: the reduction of nitrobenzene to aniline by iron-oxide-bound Fe²⁺.

SUBMITTER: Chen G 

PROVIDER: S-EPMC9546556 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature