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Updated: Dec 17, 2025
Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
Published on: June 9, 2023
Dual-Defects Adjusted Crystal-Field Splitting of LaCo1-x Nix O3-δ Hollow Multishelled Structures for Efficient Oxygen
Huan Wang1,2, Jian Qi2,3, Nailiang Yang2,3
1Department of Physical Chemistry, School of Metallurgical and Ecological Engineering, University of Science & Technology Beijing, Beijing, 100083, P. R. China.
Abstract:
To boost the performance for various applications, a rational bottom-up design on materials is necessary. The defect engineering on nanoparticle at the atomic level can efficiently tune the electronic behavior, which offers great opportunities in enhancing the catalytic performance. In this paper, we optimized the surface oxygen vacancy concentration and created the lattice distortion in rare-earth-based perovskite oxide through gradient replacement of the B site with valence alternated element. The dual defects make the electron spin state transit from low spin state to high spin state, thus decreasing the charge transport resistance. Furthermore, assembly the modified nanoparticle subunits into the micro-sized hollow multishelled structures can provide porous shells, abundant interior space and effective contact, which enables an enhanced mass transfer and a shorter charge transport path. As a result, the systemic design in the electronic and nano-micro structures for catalyst has brought an excellent oxygen evolution performance.
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