Effective band gap engineering in multi-principal oxides (CeGdLa-Zr/Hf)O_x by temperature-induced oxygen vacancies.

ABSTRACT: Oxygen vacancy control has been one of the most efficient methods to tune the physicochemical properties of conventional oxide materials. A new conceptual multi-principal oxide (MPO) is still lacking a control approach to introduce oxygen vacancies for tuning its inherent properties. Taking multi-principal rare earth-transition metal (CeGdLa-Zr/Hf) oxides as model systems, here we report temperature induced oxygen vacancy generation (OVG) phenomenon in MPOs. It is found that the OVG is strongly dependent on the composition of the MPOs showing different degrees of oxygen loss in (CeGdLaZr)O_x and (CeGdLaHf)O_x under identical high temperature annealing conditions. The results revealed that (CeGdLaZr)O_x remained stable single phase with a marginal decrease in t

SUBMITTER: Hu Y 

PROVIDER: S-EPMC9911753 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature