Szczegóły publikacji
Opis bibliograficzny
Small-size atom-driven distortion realizes high-entropy oxides with simultaneous chemical stability and activity enhancement enabling a practical cathode for solid oxide fuel cells / Wenjing Zhang, Wenjia Ma, Yuan Gao, Xu Han, Fangjun Jin, Ling Zhao, Kun ZHENG, Yihan Lin, Peizhong Feng, Shaorong Wang, Zongping Shao // Applied Catalysis . B, Environment and Energy ; ISSN 0926-3373. — 2026 — vol. 383 art. no. 126147, s. 1-12. — Bibliogr. s. 10-12, Abstr. — Publikacja dostępna online od: 2025-11-01
Autorzy (11)
- Zhang Wenjing
- Ma Wenjia
- Gao Yuan
- Han Xu
- Jin Fangjun
- Zhao Ling
- AGHZheng Kun
- Ling Yihan
- Feng Peizhong
- Wang Shaorong
- Shao Zongping
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 164306 |
|---|---|
| Data dodania do BaDAP | 2026-01-26 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.apcatb.2025.126147 |
| Rok publikacji | 2026 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Applied Catalysis, B, Environmental |
Abstract
Both high activity for oxygen reduction reaction and excellent chemical stability against contaminants in the surrounding atmosphere under operating conditions are required for a viable cathode of solid oxide fuel cells. However, traditional Ba0.8Sr0.2Co0.2Fe0.8O3-δ (BSCF) crystal structures suffer from instability under both high-temperature, high-reduction conditions and low-temperature, high-oxidation environments, making them prone to poisoning and significantly compromising their long-term operational stability. In this study, we engineered lattice distortion in BSCF by incorporating small-sized atoms at the A-site, resulting in a novel Ba0.2Sr0.2La0.2Pr0.2Sm0.2Co0.2Fe0.8O3-δ (H-BSCF) high-entropy perovskite oxide, which shows significantly improved resistance to CO2 and Cr vapor poisoning without impairing catalytic activity. Both experimental and results show the high-entropy strategy introduces lattice distortion, enhancing structural stability to prevent phase transitions and segregation. This distortion induces a spin state transition in Co3 + ions that increases the density of unpaired electrons and significantly enhances Co 3d-O 2p orbital hybridization, which also prevent structural collapse, thereby markedly improving chemical stability without sacrificing catalytic activity. Density functional theory calculations demonstrate that H-BSCF possesses favorable oxygen migration energy and high segregation energy. The combined superior catalytic activity and stability make H-BSCF promising for industrial application.
