Issue 94, 2023

Are the Brønsted acid sites in amorphous silica–alumina bridging?

Abstract

Competing models exist to explain the differences in the activity of zeolites and amorphous silica–aluminas. Some postulate that silica–alumina contains dilute zeolitic bridging acid sites, while others favor a pseudo-bridging silanol model. We employed a selective isotope labeling strategy to assess the existence of Si–O(H)–Al bonds using NMR-based distance measurements.

Graphical abstract: Are the Brønsted acid sites in amorphous silica–alumina bridging?

Supplementary files

Article information

Article type
Communication
Submitted
29 Aug 2023
Accepted
31 Oct 2023
First published
01 Nov 2023

Chem. Commun., 2023,59, 13962-13965

Are the Brønsted acid sites in amorphous silica–alumina bridging?

W. S. Salvia, T. Y. Zhao, P. Chatterjee, W. Huang and F. A. Perras, Chem. Commun., 2023, 59, 13962 DOI: 10.1039/D3CC04237E

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