Issue 1, 2021

Cooperative catalytically active sites for methanol activation by single metal ion-doped H-ZSM-5

Abstract

Catalytic conversion of methanol to aromatics and hydrocarbons is regarded as a key alternative technology to oil processing. Although the inclusion of foreign metal species in H-ZSM-5 containing Brønsted acid site (BAS) is commonly found to enhance product yields, the nature of catalytically active sites and the rationalization for catalytic performance still remain obscure. Herein, by acquiring comparable structural parameters by both X-ray and neutron powder diffractions over a number of metal-modified ZSM-5 zeolites, it is demonstrated for the first time that active pairs of metal site-BAS within molecular distance is created when single and isolated transition metal cation is ion-exchanged with the zeolites. According to our DFT model, this could lead to the initial heterolytic cleavage of small molecules such as water and methanol by the pair with subsequent reactions to form products at high selectivity as that observed experimentally. It may account for their active and selective catalytic routes of small molecule activations.

Graphical abstract: Cooperative catalytically active sites for methanol activation by single metal ion-doped H-ZSM-5

Supplementary files

Article information

Article type
Edge Article
Submitted
25 Jul 2020
Accepted
21 Oct 2020
First published
21 Oct 2020
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2021,12, 210-219

Cooperative catalytically active sites for methanol activation by single metal ion-doped H-ZSM-5

W. Lin, S. Wu, G. Li, P. Ho, Y. Ye, P. Zhao, S. Day, C. Tang, W. Chen, A. Zheng, B. T. W. Lo and S. C. Edman Tsang, Chem. Sci., 2021, 12, 210 DOI: 10.1039/D0SC04058D

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, 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 commercial 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