Engineering yolk-shell MnFe@CeOx@TiOx nanocages as a highly efficient catalyst for selective catalytic reduction of NO with NH3 at low temperatures

doi:10.1039/d2nr02255a

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	Engineering yolk-shell MnFe@CeOx@TiOx nanocages as a highly efficient catalyst for selective catalytic reduction of NO with NH3 at low temperatures
	Cai, Ziguo 1,2,3; Zhang, Guodong 1,2; Tang, Zhicheng 1,2,4; Zhang, Jiyi 3
刊名	NANOSCALE
	2022-07-01
卷号	14 期号:34 页码:12281-12296
关键词	Ammonia Cerium oxide Iron compounds Manganese compounds Nanocatalysts Selective catalytic reduction Temperature Titanium dioxide Double shells Efficient catalysts Lows-temperatures Nanocages Reaction temperature Selective catalytic reduction of NO Temperature range TiO Water-resistances ]+ catalyst
ISSN号	2040-3364
DOI	10.1039/d2nr02255a
英文摘要	To broaden the reaction temperature range and improve the H2O-resistance of manganese-based catalysts, yolk-shell structured MnFe@CeOx@TiOx nanocages were prepared. The CeO2 shell could effectively increase the oxygen vacancy defect sites, and the TiO2 shell could remarkably improve the surface acid sites. Combining the advantages of the two shells could effectively solve the above questions. The catalytic efficiency of the yolk-shell MnFe@CeOx@TiOx-40 nanocages could reach above 90% in the range of 120-240 degrees C, and the water resistance could reach 90% at 240 degrees C. On the one hand, the construction of double shells could significantly increase the proportion of active species (Mn4+, Fe3+, Ce3+ and O-ads) and the interface effect between the shell layers could effectively enhance the interaction between metal oxides. On the other hand, the construction of double shells could achieve an appropriate balance between the redox capacity of the catalyst and surface acidity. Simultaneously, in situ DRIFT spectroscopy indicated that the yolk-shell MnFe@CeOx@TiOx-40 nanocages mainly followed the L-H mechanism during the NH3-SCR reaction. Finally, this double-shell structure strategy provided a new idea for constructing a Mn-based catalyst with a wide temperature window and better low-temperature water resistance.
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000830674900001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/159469]
专题	石油化工学院
作者单位	1.Chinese Acad Sci, Natl Engn Res Ctr Fine Petrochem Intermediates, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China; 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China; 3.Lanzhou Univ Technol, Sch Petr & Chem, Lanzhou 730050, Peoples R China; 4.Yantai Zhongke Res Inst Adv Mat & Green Chem Engn, Shandong Lab Yantai Adv Mat & Green Mfg, Yantai 264006, Peoples R China
推荐引用方式 GB/T 7714	Cai, Ziguo,Zhang, Guodong,Tang, Zhicheng,et al. Engineering yolk-shell MnFe@CeOx@TiOx nanocages as a highly efficient catalyst for selective catalytic reduction of NO with NH3 at low temperatures[J]. NANOSCALE,2022,14(34):12281-12296.
APA	Cai, Ziguo,Zhang, Guodong,Tang, Zhicheng,&Zhang, Jiyi.(2022).Engineering yolk-shell MnFe@CeOx@TiOx nanocages as a highly efficient catalyst for selective catalytic reduction of NO with NH3 at low temperatures.NANOSCALE,14(34),12281-12296.
MLA	Cai, Ziguo,et al."Engineering yolk-shell MnFe@CeOx@TiOx nanocages as a highly efficient catalyst for selective catalytic reduction of NO with NH3 at low temperatures".NANOSCALE 14.34(2022):12281-12296.