Issue 27, 2024

Regulation of a Ni3Sn2 intermetallic catalyst using highly dispersed Pd species to boost propyne semi-hydrogenation

Abstract

Tailoring adsorption behaviors and promoting activation of hydrogenation on Ni active sites are significant but challenging for designing high-performance Ni-based catalysts for selective hydrogenation. Herein, we propose to introduce highly dispersed Pd species into a Ni3Sn2 intermetallic catalyst to enhance the catalytic performance of propyne semi-hydrogenation. Detailed characterization studies, including X-ray diffraction and high-resolution transmission electron microscopy, indicate that the introduction of Pd species maintains the Ni3Sn2 crystal structure in the fabricated (Ni0.9Pd0.1)3Sn2 catalyst, while regulating the electronic structures of Ni sites, and thus weakens the propylene adsorption. Furthermore, combined with kinetic studies and theoretical calculations, the highly dispersed Pd species are demonstrated to clearly promote the activation of hydrogenation and restrain the C–C coupling reaction. As such, the propyne conversion and propylene selectivity are simultaneously improved (i.e., 96.0% propylene selectivity at 94.6% of propyne conversion) on the (Ni0.9Pd0.1)3Sn2 catalyst as compared with the Ni3Sn2 catalyst. These findings presented here indicate that the introduction of noble-metal species onto Ni-based intermetallic catalysts is an effective strategy for enhancing the activity while retaining high selectivity for selective hydrogenation.

Graphical abstract: Regulation of a Ni3Sn2 intermetallic catalyst using highly dispersed Pd species to boost propyne semi-hydrogenation

Supplementary files

Article information

Article type
Paper
Submitted
05 Apr 2024
Accepted
23 May 2024
First published
24 May 2024

J. Mater. Chem. A, 2024,12, 16482-16490

Regulation of a Ni3Sn2 intermetallic catalyst using highly dispersed Pd species to boost propyne semi-hydrogenation

K. Yan, X. Ge, W. Li, Y. Liang, W. Xiong, J. Zhang, G. Qian, D. Chen, Y. Cao, X. Zhou and X. Duan, J. Mater. Chem. A, 2024, 12, 16482 DOI: 10.1039/D4TA02342K

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