Issue 3, 2024

Enhanced surface Lewis acidity of ZrO2 by –HSO4 for efficient CF4 decomposition

Abstract

Tetrafluoromethane (CF4), as the simplest and most abundant perfluorocarbon in the atmosphere, is listed in the ‘United Nations Framework Convention on Gases’ for its strong greenhouse potential. With its increasing atmospheric emissions, catalytic hydrolysis of CF4 as a non-toxic by-product method has been extensively studied. However, the highly symmetric and inert structure of CF4 makes it hard to be adsorbed on the catalyst surface. Herein, we developed a protonated sulfate (–HSO4) modified ZrO2 (S-ZrO2) to enhance CF4 adsorption and achieve its complete decomposition at 650 °C, which was superior to common γ-Al2O3. Combining the surface acidity test, in situ infrared spectroscopy and density function theory simulations, we demonstrated that the introduced –HSO4 effectively enhances the Lewis acidity of adjacent Zr sites, which shows strong CF4 adsorption ability and promotes its decomposition.

Graphical abstract: Enhanced surface Lewis acidity of ZrO2 by –HSO4 for efficient CF4 decomposition

Supplementary files

Article information

Article type
Paper
Submitted
14 Nov 2023
Accepted
03 Jan 2024
First published
03 Jan 2024

Environ. Sci.: Nano, 2024,11, 881-888

Enhanced surface Lewis acidity of ZrO2 by –HSO4 for efficient CF4 decomposition

Y. Chen, C. Kao, T. Luo, H. Zhang, Y. Long, J. Fu, Z. Lin, L. Chai, T. Chan and M. Liu, Environ. Sci.: Nano, 2024, 11, 881 DOI: 10.1039/D3EN00826F

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