标題: On the role of cationic defects over the surface reactivity of manganite-based perovskites for low temperature catalytic oxidation of formaldehyde

作者: Xu, Y (Xu, Yin); Dhainaut, J (Dhainaut, Jeremy); Dacquin, JP (Dacquin, Jean-Philippe); Lamonier, JF (Lamonier, Jean-Francois); Zhang, H (Zhang, Hui); Royer, S (Royer, Sebastien)

來源出版物: APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY  卷: 342  文獻号: 123400  DOI: 10.1016/j.apcatb.2023.123400  提前訪問日期: OCT 2023   出版年: MAR 2024  

摘要: Defect engineering in catalytic materials is a versatile strategy to fine-tune their performance towards oxidation reactions, and break the related bottlenecks. Herein, a series of La1_ xMnO3 perovskite-based materials was designedly synthesized to investigate the effect of cation defects on their physico-chemical properties. Based on extensive characterizations and density function theory (DFT) calculations, it is demonstrated that La-deficiency could orderly induce oxygen vacancies and electronic structure regulation on perovskite, which prominently promotes the catalytic activity towards formaldehyde oxidation. The leading material (La0.6MnO3) could retain high activity for 63 h, either under dry or humid air. In brief, this work unveils the feasibility of modulating the surface reactivity by modifying the electronic structure properties of lanthanum manganite perovskites following simple adjustment of the A-site cationic vacancies, and also highlights A-site deficient perovskite as a potentially efficient catalyst for environmental remediation.

作者關鍵詞: Perovskite; Lanthanum deficiency; Surface defects; Electronic structure regulation; Formaldehyde oxidation

地址: [Xu, Yin; Zhang, Hui] Wuhan Univ, Hubei Environm Remediat Mat Engn Technol Res Ctr, Dept Environm Sci & Engn, Wuhan 430079, Peoples R China.

[Xu, Yin; Dhainaut, Jeremy; Dacquin, Jean-Philippe; Lamonier, Jean-Francois; Royer, Sebastien] Univ Lille, Univ Artois, Un Catalyse & Chim Solide, CNRS,Cent Lille,UMR 8181 UCCS, F-59000 Lille, France.

[Xu, Yin] Hubei Univ, Fac Resources & Environm Sci, Hubei Key Lab Reg Dev & Environm Response, Wuhan 430062, Peoples R China.

通訊作者地址: Zhang, H (通訊作者)，Wuhan Univ, Hubei Environm Remediat Mat Engn Technol Res Ctr, Dept Environm Sci & Engn, Wuhan 430079, Peoples R China.

Dhainaut, J (通訊作者)，Univ Lille, Univ Artois, Un Catalyse & Chim Solide, CNRS,Cent Lille,UMR 8181 UCCS, F-59000 Lille, France.

影響因子：22.1