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Issue 23, 2019
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Developing two-dimensional solid superacids with enhanced mass transport, extremely high acid strength and superior catalytic performance

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Abstract

Solid acids have been widely used as heterogeneous catalysts in developing green and sustainable chemistry. However, it remains a challenge to improve the mass transport properties and acid strength of solid acids simultaneously. Herein, we report a class of two dimensional (2D) layered hybrid solid acids with outstanding mass transfer and extremely high acid strength by incorporating sulfonated polymers in-between montmorillonite layers. The 2D layered structure and broad distribution of pore sizes allow for highly efficient mass transport of substrate molecules into and out of the solid acids. The acid strength of these solid acids was found to be stronger than that of 100% H2SO4, H3PW12O40 and any other reported solid acids to date, as determined by 1H and 31P solid-state NMR. These 2D solid acids show extraordinary catalytic performance in biomass conversion to fuels, superior to that of H3PW12O40, HCl and H2SO4. Theoretical calculations and control experiments reveal that H-bond based interactions between the polymer and montmorillonite facilitate the unusually high acid strengths found in these samples.

Graphical abstract: Developing two-dimensional solid superacids with enhanced mass transport, extremely high acid strength and superior catalytic performance

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Supplementary files

Article information


Submitted
22 Apr 2019
Accepted
20 May 2019
First published
30 May 2019

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2019,10, 5875-5883
Article type
Edge Article

Developing two-dimensional solid superacids with enhanced mass transport, extremely high acid strength and superior catalytic performance

F. Liu, X. Yi, W. Chen, Z. Liu, W. Chen, C. Qi, Y. Song and A. Zheng, Chem. Sci., 2019, 10, 5875 DOI: 10.1039/C9SC01988J

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