Direct TEM Observation of Vacancy-Mediated Heteroatom Incorporation into a Zeolite Framework: Towards Microscopic Design of Zeolite Catalysts

Li, Junyan ; Mayoral, Alvaro (Universidad de Zaragoza) ; Kubota, Yoshihiro ; Inagaki, Satoshi ; Yu, Jihong ; Terasaki, Osamu

Resumen: Incorporating hetero-metal-atom,e.g., titanium, into zeolite frameworks can enhance the catalytic activity and selectivity in oxidation reactions.However,the rational design of zeolites containing titanium at specificsites is difficult because the precise atomic structure during synthesis process remained unclear.Here, a titanosilicate with predictable titanium distribution was synthesized by mediating vacancies in a defective MSE-typezeolite precursor,based on a pre-designed synthetic route including modification of vacancies followed by titanium insertion,where electron microscopy(EM) plays a key role at each step resolving the atomic structure.Point defects including vacancies in the precursor and titanium incorporated into the vacancy-related positions have been directly observed. The results provide insights into the role of point defects in zeolites towards the rational synthesis of zeolites with desired microscopic arrangement of catalytically active sites.

Idioma: Inglés

DOI: 10.1002/anie.202211196

Año: 2022

Publicado en: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022), e202211196 [9 pp.]
ISSN: 1433-7851

Factor impacto JCR: 16.6 (2022)

Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 13 / 178 = 0.073 (2022) - Q1 - T1

Factor impacto CITESCORE: 26.3 - Chemistry (Q1) - Chemical Engineering (Q1)

Factor impacto SCIMAGO: 5.573 - Chemistry (miscellaneous) (Q1) - Catalysis (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E13-20R
Financiación: info:eu-repo/grantAgreement/EC/H2020/823717/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM3
Financiación: info:eu-repo/grantAgreement/ES/MICINN/RYC-2018-024561-I

Tipo y forma: Article (Published version)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)