In situ observation of reversible phase transitions in Gd-doped ceria driven by electron beam irradiation.

ABSTRACT: Ceria-based oxides are widely utilized in diverse energy-related applications, with attractive functionalities arising from a defective structure due to the formation of mobile oxygen vacancies ( V O ⋅ ⋅ ). Notwithstanding its significance, behaviors of the defective structure and V O ⋅ ⋅ in response to external stimuli remain incompletely explored. Taking the Gd-doped ceria (Ce_0.88Gd_0.12O_2-δ) as a model system and leveraging state-of-the-art transmission electron microscopy techniques, reversible phase transitions associated with massive V O ⋅ ⋅ rearrangement are stimulated and visualized in situ with sub-Å resolution. Electron dose rate is identified as a pivotal factor in modulating the phase transition, and both the V O ⋅ ⋅ concentration and

SUBMITTER: Ran K 

PROVIDER: S-EPMC11408598 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature