Library Creation of Ultrasmall Multi-metallic Nanoparticles Confined in Mesoporous MFI Zeolites

Xiaoli Jia; Jingang Jiang; Shihui Zou; Lu Han; Haiyin Zhu; Qing Zhang; Yue Ma; Peng Luo; Peng Wu; Alvaro Mayoral; Xinbao Han; Jun Cheng; Shunai Che

doi:10.1002/anie.202103007

Library Creation of Ultrasmall Multi-metallic Nanoparticles Confined in Mesoporous MFI Zeolites

Angew Chem Int Ed Engl. 2021 Jun 21;60(26):14571-14577. doi: 10.1002/anie.202103007. Epub 2021 May 14.

Authors

Xiaoli Jia¹, Jingang Jiang², Shihui Zou³, Lu Han⁴, Haiyin Zhu⁵, Qing Zhang⁵, Yue Ma², Peng Luo², Peng Wu², Alvaro Mayoral^{5

6}, Xinbao Han¹, Jun Cheng⁷, Shunai Che^{1

4}

Affiliations

¹ School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, P. R. China.
² Shanghai Key Laboratory of Green Chemical Science and Chemical Process, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, P. R. China.
³ Key Lab of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou, 310036, P. R. China.
⁴ Department School of Chemical Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, P. R. China.
⁵ Center for High-Resolution Electron Microscopy (CħEM), School of Physical Science and Technology, ShanghaiTech University, 393 Middle Huaxia Road, Pudong, Shanghai, 201210, P. R. China.
⁶ Instituto de Nanociencia Materiales de Aragon (INMA-CSIC), University of Zaragoza, 12, Calle de Pedro Cerbuna, 50009, Zaragoza, Spain.
⁷ College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P. R. China.

PMID: 33826203
DOI: 10.1002/anie.202103007

Abstract

The development of materials integrated with ultrasmall multi-metal nanoparticles (UMMNs) and mesoporous zeolite is a considerable challenge in chemistry and materials science. We designed a trifunctional surfactant, in which the pyridyl benzimidazole in the hydrophobic tail generates the mesopores through π-π stacking; the diquaternary ammonium in the hydrophilic headgroup direct the formation of MFI zeolite sheets and the nitrogen atoms in the heterocyclic rings coordinate with various metal ions to form UMMNs confined in the zeolite matrix after calcination and reduction. A library of 56 UMMNs confined within both micropores and mesopores of MFI zeolites (MMZs) with 4 mono-, 14 bi- and 38 tri-metallic nanoparticles (sizes of 1.3-4.7 nm) of combinations of Rh, Pd, Pt, Au, Fe, Co, Ni, Cu and Zn were made. An improved catalytic performance was exhibited in the sequence of Rh-MMZ<Rh/Pt-MMZ<Rh/Pt/Ni-MMZ for the mild oxidation of methane to methanol or liquid acid.

Keywords: MFI zeolite; molecular sieves; multi-metallic nanoparticles; templating route; zeolites.

Abstract

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