Construction of a sandwich-like UiO-66-NH2@Pt@mSiO2 catalyst for one-pot cascade reductive amination of nitrobenzene with benzaldehyde

Hong Zhao; Boyang Li; Huacheng Zhao; Jianfeng Li; Jinfang Kou; Hanghang Zhu; Bing Liu; Zhenhua Li; Xun Sun; Zhengping Dong

doi:10.1016/j.jcis.2021.08.081

Construction of a sandwich-like UiO-66-NH₂@Pt@mSiO₂ catalyst for one-pot cascade reductive amination of nitrobenzene with benzaldehyde

J Colloid Interface Sci. 2022 Jan 15;606(Pt 2):1524-1533. doi: 10.1016/j.jcis.2021.08.081. Epub 2021 Aug 16.

Authors

Hong Zhao¹, Boyang Li¹, Huacheng Zhao¹, Jianfeng Li¹, Jinfang Kou¹, Hanghang Zhu¹, Bing Liu², Zhenhua Li³, Xun Sun⁴, Zhengping Dong⁵

Affiliations

¹ State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China.
² Key Laboratory of Catalysis and Materials Sciences of the Ministry of Education, South-Central University for Nationalities, Wuhan 430074, PR China. Electronic address: [email protected].
³ Key Laboratory of Environmental Friendly Composite Materials and Biomass in Universities of Gansu Province, Northwest Minzu University, Lanzhou 730030, PR China. Electronic address: [email protected].
⁴ Shandong Applied Research Center of Gold Nanotechnology (Au-SDARC), School of Chemistry & Chemical Engineering, Yantai University, Yantai 264005, PR China. Electronic address: [email protected].
⁵ State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, PR China. Electronic address: [email protected].

PMID: 34500155
DOI: 10.1016/j.jcis.2021.08.081

Abstract

Heterogeneous noble metal-based catalysts with stable, precise structures and high catalytic performance are of great research interest for sustainable catalysis. Herein, we designed the novel sandwich-like metal-organic-framework composite nanocatalyst UiO-66-NH₂@Pt@mSiO₂ using UiO-66-NH₂@Pt as the core, and mesoporous SiO₂ as the shell. The obtained UiO-66-NH₂@Pt@mSiO₂ catalyst shows a well-defined structure and interface, and the protection of the mSiO₂ shell can efficiently prevent Pt NPs from aggregating and leaching in the reaction process. In the one-pot cascade reaction of nitroarenes and aromatic aldehydes to secondary amines, UiO-66-NH₂@Pt@mSiO₂ shows excellent catalytic performance due to acid catalytic sites provided by UiO-66-NH₂ and Pt hydrogenation catalytic sites. Furthermore, the porous structure of the UiO-66-NH₂@Pt@mSiO₂ catalyst also enhances reactant diffusion and improves the reaction efficiency. This work provides a new avenue to meticulously design well-defined nanocatalysts with superior catalytic performance and stability for challenging reactions.

Keywords: Cascade reaction; Sandwich-like catalyst; Secondary amines; UiO-66-NH(2)@Pt@mSiO(2).