Space charge governs the kinetics of metal exsolution.

ABSTRACT: Nanostructured composite electrode materials play a major role in the fields of catalysis and electrochemistry. The self-assembly of metallic nanoparticles on oxide supports via metal exsolution relies on the transport of reducible dopants towards the perovskite surface to provide accessible catalytic centres at the solid-gas interface. At surfaces and interfaces, however, strong electrostatic gradients and space charges typically control the properties of oxides. Here we reveal that the nature of the surface-dopant interaction is the main determining factor for the exsolution kinetics of nickel in SrTi_0.9Nb_0.05Ni_0.05O_3-δ. The electrostatic interaction of dopants with surface space charge regions forming upon thermal oxidation results

SUBMITTER: Weber ML 

PROVIDER: S-EPMC10917682 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature