Promotional effect for SCR of NO with CO over MnOx-doped Fe3O4 nanoparticles derived from metal-organic frameworks

doi:10.1016/j.cjche.2021.03.043

Chinese Journal of Chemical Engineering ›› 2022, Vol. 46 ›› Issue (6): 113-125.DOI: 10.1016/j.cjche.2021.03.043

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Promotional effect for SCR of NO with CO over MnO_x-doped Fe₃O₄ nanoparticles derived from metal-organic frameworks

Yu Zhang¹, Ling Zhao^1,3, Ziang Chen¹, Xinyong Li²

1 School of Ecology and Environment, Inner Mongolia University, China;
2 School of Environmental Science & Technology, Dalian University of Technology, China;
3 College of Veterinary Medicine, University of Florida, United States

Received:2021-01-04 Revised:2021-03-18 Online:2022-07-20 Published:2022-06-28
Contact: Ling Zhao,E-mail:nmzhl@hotmail.com
Supported by:
We acknowledge the financial support of the National Natural Science Foundation of China (Nos. 21866022, 21567018), Inner Mongolia "Grassland talents" project, Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Key Laboratory of Ecology and Resource Use of the Mongolian Plateau and Collaborative Innovation Center for Grassland Ecological Security, Ministry of Education of China.

Promotional effect for SCR of NO with CO over MnO_x-doped Fe₃O₄ nanoparticles derived from metal-organic frameworks

Yu Zhang¹, Ling Zhao^1,3, Ziang Chen¹, Xinyong Li²

1 School of Ecology and Environment, Inner Mongolia University, China;
2 School of Environmental Science & Technology, Dalian University of Technology, China;
3 College of Veterinary Medicine, University of Florida, United States

通讯作者: Ling Zhao,E-mail:nmzhl@hotmail.com
基金资助:
We acknowledge the financial support of the National Natural Science Foundation of China (Nos. 21866022, 21567018), Inner Mongolia "Grassland talents" project, Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, Key Laboratory of Ecology and Resource Use of the Mongolian Plateau and Collaborative Innovation Center for Grassland Ecological Security, Ministry of Education of China.

Abstract

Abstract: MnO_x-Fe₃O₄ nanomaterials were fabricated by using the innovative scheme of pyrolyzing manganese-doped iron-based metal organic framework in inert atmosphere and exhibited extraordinary performance of NO reduction by CO (CO-SCR). Multi-technology characterizations were conducted to ascertain the properties of fabricated materials (e.g., TGA, XRD, SEM, FT-IR, XPS, BET, H₂-TPR and O₂-TPD). Moreover, the interaction between reactants and catalysts was ascertained by in situ FT-IR. Experimental results demonstrated that Mn was an ideal promoter for iron oxides, resulting in decrease of crystallite size, improve reducibility property, enhance the mobility and the amount of lattice O^2- species, as well as strength the adsorption ability of active NO and CO to form multiple species (e.g., nitrate and carbonate). The unprecedented enhancement of CO-SCR activity over Mn-Fe nanomaterials follows the Eley-Rideal (E-R) and Langmuir-Hinshelwood (L-H) reaction pathway.

Key words: Metal-organic framework, MnO_x-doped Fe₃O₄, NO reduction, In situ FT-IR, Reaction mechanism

摘要： MnO_x-Fe₃O₄ nanomaterials were fabricated by using the innovative scheme of pyrolyzing manganese-doped iron-based metal organic framework in inert atmosphere and exhibited extraordinary performance of NO reduction by CO (CO-SCR). Multi-technology characterizations were conducted to ascertain the properties of fabricated materials (e.g., TGA, XRD, SEM, FT-IR, XPS, BET, H₂-TPR and O₂-TPD). Moreover, the interaction between reactants and catalysts was ascertained by in situ FT-IR. Experimental results demonstrated that Mn was an ideal promoter for iron oxides, resulting in decrease of crystallite size, improve reducibility property, enhance the mobility and the amount of lattice O^2- species, as well as strength the adsorption ability of active NO and CO to form multiple species (e.g., nitrate and carbonate). The unprecedented enhancement of CO-SCR activity over Mn-Fe nanomaterials follows the Eley-Rideal (E-R) and Langmuir-Hinshelwood (L-H) reaction pathway.

关键词: Metal-organic framework, MnO_x-doped Fe₃O₄, NO reduction, In situ FT-IR, Reaction mechanism

Yu Zhang, Ling Zhao, Ziang Chen, Xinyong Li. Promotional effect for SCR of NO with CO over MnO_x-doped Fe₃O₄ nanoparticles derived from metal-organic frameworks[J]. Chinese Journal of Chemical Engineering, 2022, 46(6): 113-125.

Yu Zhang, Ling Zhao, Ziang Chen, Xinyong Li. Promotional effect for SCR of NO with CO over MnO_x-doped Fe₃O₄ nanoparticles derived from metal-organic frameworks[J]. 中国化学工程学报, 2022, 46(6): 113-125.

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Promotional effect for SCR of NO with CO over MnO_x-doped Fe₃O₄ nanoparticles derived from metal-organic frameworks

Promotional effect for SCR of NO with CO over MnO_x-doped Fe₃O₄ nanoparticles derived from metal-organic frameworks

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