Issue 8, 2020

Titanium silicalite-1 zeolite encapsulating Au particles as a catalyst for vapor phase propylene epoxidation with H2/O2: a matter of Au–Ti synergic interaction

Abstract

Developing a highly effective Au–Ti catalyst with synergic interaction for vapor phase propylene epoxidation with H2/O2 has tremendous industrial and scientific significance. In this study, a novel zeolite encapsulated catalyst is proposed to enhance such a synergic interaction. The proposed Au–Ti@MFI catalyst is prepared via seed-directed solvent-free synthesis combined with bio-extract integration, in which the encapsulated Au nanoparticles (NPs) are anchored with the Ti site of the titanium silicalite-1 zeolite (TS-1). The as-prepared catalyst shows a simultaneously high propylene conversion of 14.8%, a PO selectivity of 83.9% and an excellent PO yield of 205.0 gPO kgcat−1 h−1, outperforming the conventional supported Au/TS-1 catalyst. The intrinsic properties for Au–Ti synergic interaction are elucidated by multiple characterizations and DFT calculations. It is found that the zeolite encapsulated structure realizes intimate contact and electronic interaction between Au and Ti, remarkably enhancing the Au–Ti synergic interaction of the catalyst. This synergy effectively facilitates the generation and transfer of hydrogen peroxide, thereby significantly promoting the performances of the catalyst.

Graphical abstract: Titanium silicalite-1 zeolite encapsulating Au particles as a catalyst for vapor phase propylene epoxidation with H2/O2: a matter of Au–Ti synergic interaction

Supplementary files

Article information

Article type
Paper
Submitted
13 Nov 2019
Accepted
22 Jan 2020
First published
22 Jan 2020

J. Mater. Chem. A, 2020,8, 4428-4436

Titanium silicalite-1 zeolite encapsulating Au particles as a catalyst for vapor phase propylene epoxidation with H2/O2: a matter of Au–Ti synergic interaction

L. Wang, J. Dai, Y. Xu, Y. Hong, J. Huang, D. Sun and Q. Li, J. Mater. Chem. A, 2020, 8, 4428 DOI: 10.1039/C9TA12470E

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements