Synergistic effect between the acidity and redox performance of the SO42−-CeO2 catalysts for NO reduction

Jinhui Zhang; Jiayao Liu; Xinfeng Zhu; Kai Wang; Zhenzhen Huang; Haiyan Kang; Shiqiang Yin; Shoushu Liu; Luwei Liu; Siyuan Zhang; Zhongxian Song

Chemical Physics Impact (Jun 2023)

Synergistic effect between the acidity and redox performance of the SO42−-CeO2 catalysts for NO reduction

Jinhui Zhang,
Jiayao Liu,
Xinfeng Zhu,
Kai Wang,
Zhenzhen Huang,
Haiyan Kang,
Shiqiang Yin,
Shoushu Liu,
Luwei Liu,
Siyuan Zhang,
Zhongxian Song

Affiliations

Jinhui Zhang: Faculty of Environmental and Municipal Engineering, Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Key Laboratory of Carbon Emission Reduction and Combined Air Pollution Control Technology, Henan University of Urban Construction, Pingdingshan 467036, China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou Higher Education Mega Centre, South China University of Technology, Guangzhou 510006, China
Jiayao Liu: Faculty of Environmental and Municipal Engineering, Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Key Laboratory of Carbon Emission Reduction and Combined Air Pollution Control Technology, Henan University of Urban Construction, Pingdingshan 467036, China
Xinfeng Zhu: Faculty of Environmental and Municipal Engineering, Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Key Laboratory of Carbon Emission Reduction and Combined Air Pollution Control Technology, Henan University of Urban Construction, Pingdingshan 467036, China; Corresponding authors at: Faculty of Environmental and Municipal Engineering, Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Key Laboratory of Carbon Emission Reduction and Combined Air Pollution Control Technology, Henan University of Urban Construction, Pingdingshan 467036, China.
Kai Wang: School of Resources & Environment, Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Henan Polytechnic University, Jiaozuo 454003, China
Zhenzhen Huang: Faculty of Environmental and Municipal Engineering, Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Key Laboratory of Carbon Emission Reduction and Combined Air Pollution Control Technology, Henan University of Urban Construction, Pingdingshan 467036, China
Haiyan Kang: Faculty of Environmental and Municipal Engineering, Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Key Laboratory of Carbon Emission Reduction and Combined Air Pollution Control Technology, Henan University of Urban Construction, Pingdingshan 467036, China
Shiqiang Yin: Faculty of Environmental and Municipal Engineering, Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Key Laboratory of Carbon Emission Reduction and Combined Air Pollution Control Technology, Henan University of Urban Construction, Pingdingshan 467036, China
Shoushu Liu: Faculty of Environmental and Municipal Engineering, Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Key Laboratory of Carbon Emission Reduction and Combined Air Pollution Control Technology, Henan University of Urban Construction, Pingdingshan 467036, China
Luwei Liu: Faculty of Environmental and Municipal Engineering, Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Key Laboratory of Carbon Emission Reduction and Combined Air Pollution Control Technology, Henan University of Urban Construction, Pingdingshan 467036, China
Siyuan Zhang: School of Laboratory Medicine/Sichuan Provincial Engineering Laboratory for Prevention and Control Technology of Veterinary Drug Residue in Animal-Origin Food, Chengdu Medical College, Chengdu 610500, China; Corresponding authors at: Faculty of Environmental and Municipal Engineering, Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Key Laboratory of Carbon Emission Reduction and Combined Air Pollution Control Technology, Henan University of Urban Construction, Pingdingshan 467036, China.
Zhongxian Song: Faculty of Environmental and Municipal Engineering, Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Key Laboratory of Carbon Emission Reduction and Combined Air Pollution Control Technology, Henan University of Urban Construction, Pingdingshan 467036, China; Corresponding authors at: Faculty of Environmental and Municipal Engineering, Henan Key Laboratory of Water Pollution Control and Rehabilitation Technology, Key Laboratory of Carbon Emission Reduction and Combined Air Pollution Control Technology, Henan University of Urban Construction, Pingdingshan 467036, China.

Journal volume & issue: Vol. 6
p. 100215

Abstract

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Herein, a series of SO42−-CeO2 catalysts were synthesized by a sol-gel method for the selective catalytic reduction of NO by NH3 (NH3-SCR). The introduction of SO42− endowed composite catalyst with higher catalytic activity than pure CeO2. In particular, 3% SC with 3% SO42− showed over 90% NO removal between 247 and 450 °C. SO42− promoted the increase of Ce3+ content, adsorbed oxygen, and surface acidity of the composites. Furthermore, the interaction between SO42− and cerium oxide induced the synergistic effect between acidic sites and redox sites in the NH3-SCR reaction. The introduction of SO42− significantly supported the increase of B-acid and the enhancement of l-acid sites, and promoted the NH3-SCR reaction to follow both Eley-Rideal and Langmuir-Hinshelwood mechanisms.

Published in Chemical Physics Impact

ISSN: 2667-0224 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics; Science: Chemistry
Website: https://www.journals.elsevier.com/chemical-physics-impact/

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