Citation: Yunpeng Wang, Zhuxin Lyu, Yueming Sun, Yunqian Dai. Entropy-stabilized nanoporous structures enable sintering-resistant Pt species[J]. Chinese Chemical Letters, ;2026, 37(3): 112114. doi: 10.1016/j.cclet.2025.112114 shu

Entropy-stabilized nanoporous structures enable sintering-resistant Pt species

School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China

daiy@seu.edu.cn

Received Date: 30 June 2025
Revised Date: 13 November 2025
Accepted Date: 13 November 2025
Available Online: 14 November 2025

Figures(5)

Supported noble‐metal catalysts often suffer from nanoparticle sintering, resulting in rapid deactivation under high‐temperature conditions. We report hierarchically porous spinel type high-entropy oxide (S-HEO) nanofibers, (CrMnFeCoMg)₃O₄, as robust supports for Pt nanoparticles. The porous structure (38.5 m²/g) endows thermal stability, preserving porosity after 880 ℃ calcination. The porous Pt/S-HEO-500 exhibits exceptional sinter-resistance. Under 500 ℃ calcination, Pt exhibits only a 0.2 nm growth increment, owing to the physical confinement and strong metal–support interactions. For Pt/S-HEO-500, the T₅₀ (50% conversion temperature) for CO oxidation was merely 9 ℃ higher than that without calcination, with 100% conversion retained over 100 h of steady-state operation. These findings position porous spinel HEO nanofibers as a versatile platform for designing sinter-resistant noble-metal catalysts in high-temperature applications.
- Porous,
- Nanofibers,
- High entropy,
- Pt,
- CO oxidation
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