标题: 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)

来源出版物: APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY卷: 342文献号: 123400 DOI: 10.1016/j.apcatb.2023.123400提前访问日期: 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.

作者关键词: 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.

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

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

影响因子：22.1