Modification of Pillared Intercalated Montmorillonite Clay as Heterogeneous Pd Catalyst Supports

Kailang Sun; Yonghong Liu; Taojun Zhang; Jie Zhou; Jinyang Chen; Xiaorong Ren; Zhen Yang; Minfeng Zeng

doi:10.3390/molecules28227638

Modification of Pillared Intercalated Montmorillonite Clay as Heterogeneous Pd Catalyst Supports

Molecules. 2023 Nov 17;28(22):7638. doi: 10.3390/molecules28227638.

Authors

Kailang Sun¹, Yonghong Liu¹, Taojun Zhang¹, Jie Zhou¹, Jinyang Chen¹, Xiaorong Ren¹, Zhen Yang¹, Minfeng Zeng¹

Affiliation

¹ Research Center of Advanced Catalytic Materials & Functional Molecular Synthesis, Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, College of Chemistry & Chemical Engineering, Shaoxing University, Shaoxing 312000, China.

Abstract

Montmorillonite clay was modified by pillaring with AlMn oxides in different Al/Mn ratios and intercalation of two kinds of N-containing polymers (i.e., chitosan (CS) and polyvinyl pyrrolidinone (PVP)) chains. The modified pillared montmorillonite clay (PM) showed a rich two-dimensional layered porous structure with tunable parameters, such as large interlayer spacing, high specific area, and large porous volume. They were then used as supports for Pd nanoparticles. As applied in coupling reactions of aryl halides with terminal alkynes, Pd@CS/AlMn-PM showed better comprehensive catalytic performance than Pd@PVP/AlMn-PM. This was mainly attributed to its higher specific area, stronger chelation to Pd species, and better solvent resistance.

Keywords: heterogeneous catalyst; montmorillonite clay; pillaring.

Grants and funding

This research was funded by Shaoxing Key Science and Technology Innovation Team Project (2020-34).