MnFe@CeOxCore-Shell Nanocages for the Selective Catalytic Reduction of NO with NH3at Low Temperature

doi:10.1021/acsanm.1c04194

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	MnFe@CeOxCore-Shell Nanocages for the Selective Catalytic Reduction of NO with NH3at Low Temperature
	Cai, Ziguo 1,4; Zhang, Guodong 4; Tang, Zhicheng 2,3,4; Zhang, Jiyi 1
刊名	ACS Applied Nano Materials
	2022-03-25
卷号	5 期号:3 页码:3619-3631
关键词	Ammonia Catalyst activity Cerium oxide Diffusion Iron compounds Manganese compounds Oxygen Reduction Selective catalytic reduction Shells (structures) Catalytic performance Core shell Diffusion effects Interface diffusion Interface diffusion effect Lows-temperatures Nanocages Shell layers Surface acid sites ]+ catalyst
DOI	10.1021/acsanm.1c04194
英文摘要	To enable the catalytic performance and water (H2O) resistance of manganese-based catalysts to be further improved, a series of MnFe@CeOxcore-shell nanocages were synthesized. By adjustment of the thickness of the CeO2shell layer, it was found that the MnFe@CeOx-60 catalyst with a shell layer thickness of 60 nm could exhibit more than 80% NO removal efficiency at 120-250 °C. In addition, it could exhibit better H2O resistance at 160 °C. A series of characterizations proved that the MnFe@CeOx-60 catalyst had abundant oxygen vacancy defect sites and surface acid sites. In addition, the MnFe@CeOx-60 catalyst had more Mn4+, Fe3+, Ce3+, and surface-adsorbed oxygen (Oads) species, as well as strong interactions between MnOx, FeOx, and CeOx, so that the catalyst had better catalytic activity. This indicated that the unique interface diffusion effect produced by construction of the CeO2shell could remarkably enhance the catalytic performance and H2O resistance. Simultaneously, the in situ diffuse-reflectance infrared Fourier transform analysis showed that the MnFe@CeOx-60 catalyst mainly followed the L-H reaction mechanism during the NH3selective catalytic reduction (SCR) reaction. Finally, building a shell layer could skillfully utilize the diffusion between different species to realize strong interaction among active species, which was of great significance and universality. © 2022 American Chemical Society. All rights reserved.
WOS研究方向	Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	American Chemical Society
WOS记录号	WOS:000800286500051
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/157864]
专题	石油化工学院
作者单位	1.School of Petroleum and Chemical, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing, Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering, Yantai; 264006, China 3.Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian; 116023, China; 4.State Key Lab. for Oxo Synthesis and Selective Oxidation and Natl. Eng. Res. Ctr. for Fine Petrochem. Intermediates, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou; 730000, China;
推荐引用方式 GB/T 7714	Cai, Ziguo,Zhang, Guodong,Tang, Zhicheng,et al. MnFe@CeOxCore-Shell Nanocages for the Selective Catalytic Reduction of NO with NH3at Low Temperature[J]. ACS Applied Nano Materials,2022,5(3):3619-3631.
APA	Cai, Ziguo,Zhang, Guodong,Tang, Zhicheng,&Zhang, Jiyi.(2022).MnFe@CeOxCore-Shell Nanocages for the Selective Catalytic Reduction of NO with NH3at Low Temperature.ACS Applied Nano Materials,5(3),3619-3631.
MLA	Cai, Ziguo,et al."MnFe@CeOxCore-Shell Nanocages for the Selective Catalytic Reduction of NO with NH3at Low Temperature".ACS Applied Nano Materials 5.3(2022):3619-3631.