Citation: Mudi Wu, Selvi Mushina, Mingwu Tan. Surface engineering of perovskite oxides via in-situ cobalt exsolution for catalytic toluene oxidation[J]. Chinese Chemical Letters, ;2026, 37(5): 111923. doi: 10.1016/j.cclet.2025.111923 shu

Surface engineering of perovskite oxides via in-situ cobalt exsolution for catalytic toluene oxidation

Mudi Wu ^a ,
Selvi Mushina ^b ,
Mingwu Tan ^{a, b, *,}

a.
School of Chemical & Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
b.
Institute of Sustainability for Chemicals, Energy, and Environment (ISCE2), Agency for Science, Technology, and Research (A*STAR), Jurong Island 627833, Singapore

tan_mingwu@isce2.a-star.edu.sg

Received Date: 24 May 2025
Revised Date: 19 August 2025
Accepted Date: 29 September 2025
Available Online: 29 September 2025

Figures(7)

Non-noble metal catalysts have garnered significant attention as sustainable alternatives to precious metal catalysts for the abatement of hydrocarbon emissions and mitigating environmental pollution. In this study, we employed an in-situ exsolution strategy coupled with oxidation stabilization to engineer the surface of cobalt-doped LaFeO_3-δ catalysts, successfully extending their application in an oxygen-rich scenario. The formed unique socket-like structure facilitates the exposure of highly reactive CoO_x particles with superior homogeneity in both size and distribution. The optimized catalyst, CoO_x@LFCO-3, achieved 90% toluene conversion at a notably lower temperature of 237 ℃ with a space velocity of 20,000 mL g⁻¹ h⁻¹. Mechanistic studies revealed that the enhanced interaction between exsolved cobalt oxides and the perovskite support, along with abundant active sites, significantly improved the catalyst's performance in low-temperature toluene oxidation. This work presents a scalable approach for developing cost-effective, high-performance perovskite oxide catalysts for environmental applications.
- Perovskite oxide,
- Exsolution,
- Cobalt,
- Catalytic oxidation,
- Toluene
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