The inter-connected porous CuOx-NbOx/kit-CeO2 catalyst:Enhanced activity, resistance of SO2 and H2O for the removal of NOx

He Zhang; Mingmei Li; Guoquan Liu; Yueping Bao; Yi Li; Pengfei Wang; Sihui Zhan

Chemical Physics Impact (Jun 2023)

The inter-connected porous CuOx-NbOx/kit-CeO2 catalyst:Enhanced activity, resistance of SO2 and H2O for the removal of NOx

He Zhang,
Mingmei Li,
Guoquan Liu,
Yueping Bao,
Yi Li,
Pengfei Wang,
Sihui Zhan

Affiliations

He Zhang: MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
Mingmei Li: MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
Guoquan Liu: MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
Yueping Bao: MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
Yi Li: Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Science, Tianjin University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
Pengfei Wang: School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300400, China; Corresponding authors.
Sihui Zhan: MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Corresponding authors.

Journal volume & issue: Vol. 6
p. 100179

Abstract

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In order to remove NOx from multiple sources with complex operating conditions, catalysts with excellent low-temperature activity and strong water and sulfur resistance are in high demand. Herein, we designed an efficient inter-connected porous CuOx-NbOx/kit-CeO2 catalyst for the selective catalytic reduction of NOx with NH3 (NH3-SCR). The catalyst exhibited relatively outstanding NH3-SCR activity in the low temperature range (100–300 °C) and showed remarkable stability and excellent resistance to SO2 and H2O. The inter-connected porous structure allowed the adsorption and diffusion of gaseous reactants, meanwhile, the interaction between Cu, Nb and Ce enhanced the surface acidity, redox properties and surface oxygen activity of the CuOx-NbOx/kit-CeO2 catalyst. On the basis of in situ DRIFTs studies, Eley-Rideal process was expected to be the dominant pathway with the coexistence of Langmuir–Hinshelwood mechanism at 250 °C.

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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