title: Alkali- and Sulfur-Resistant Tungsten-Based Catalysts for NOx Emissions Control.
abstract: The development of catalysts with simultaneous resistance to alkalis and sulfur poisoning is of great importance for efficiently controlling NOx emissions using the selective catalytic reduction of NOx with NH3 (SCR), because the conventional V2O5/WO3-TiO2 catalysts often suffer severe deactivation by alkalis. Here, we support V2O5 on a hexagonal WO3 (HWO) to develop a V2O5/HWO catalyst, which has exceptional resistance to alkali and sulfur poisoning in the SCR reactions. A 350 μmol g(-1) K(+) loading and the presence of 1,300 mg m(-3) SO2 do not almost influence the SCR activity of the V2O5/HWO catalyst, and under the same conditions, the conventional V2O5/WO3-TiO2 catalysts completely lost the SCR activity within 4 h. The strong resistance to alkali and sulfur poisoning of the V2O5/HWO catalysts mainly originates from the hexagonal structure of the HWO. The HWO allows the V2O5 to be highly dispersed on the external surfaces for catalyzing the SCR reactions and has the relatively smooth surfaces and the size-suitable tunnels specifically for alkalis' diffusion and trapping. This work provides a useful strategy to develop SCR catalysts with exceptional resistance to alkali and sulfur poisoning for controlling NOx emissions from the stationary source and the mobile source.
authors.affiliation: Shanghai Key Laboratory of Atmospheric Particle Pollution & Prevention (LAP3), Department of Environmental Science & Engineering, Fudan University , Shanghai 200433, China.
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Huang
authors.affiliation: School of Chemistry & Chemical Engineering, University of Jinan , Jinan 250022, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Li
authors.affiliation: Shanghai Key Laboratory of Atmospheric Particle Pollution & Prevention (LAP3), Department of Environmental Science & Engineering, Fudan University , Shanghai 200433, China.
authors.forename: Jiayi
authors.initials: J
authors.lastname: Gao
authors.affiliation: Department of Applied Physics, Chongqing University , Chongqing 401331, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Gu
authors.affiliation: Shanghai Key Laboratory of Atmospheric Particle Pollution & Prevention (LAP3), Department of Environmental Science & Engineering, Fudan University , Shanghai 200433, China.
authors.forename: Li
authors.initials: L
authors.lastname: Zheng
authors.affiliation: Shanghai Key Laboratory of Atmospheric Particle Pollution & Prevention (LAP3), Department of Environmental Science & Engineering, Fudan University , Shanghai 200433, China.
authors.forename: Pingping
authors.initials: P
authors.lastname: Hu
authors.affiliation: School of Chemistry & Chemical Engineering, University of Jinan , Jinan 250022, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Xin
authors.affiliation: Shanghai Key Laboratory of Atmospheric Particle Pollution & Prevention (LAP3), Department of Environmental Science & Engineering, Fudan University , Shanghai 200433, China.
authors.forename: Junxiao
authors.initials: J
authors.lastname: Chen
authors.affiliation: Shanghai Key Laboratory of Atmospheric Particle Pollution & Prevention (LAP3), Department of Environmental Science & Engineering, Fudan University , Shanghai 200433, China.
authors.forename: Yaxin
authors.initials: Y
authors.lastname: Chen
authors.affiliation: School of Chemistry & Chemical Engineering, University of Jinan , Jinan 250022, China.
authors.forename: Zhaoliang
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Shanghai Key Laboratory of Atmospheric Particle Pollution & Prevention (LAP3), Department of Environmental Science & Engineering, Fudan University , Shanghai 200433, China.
authors.forename: Jianmin
authors.initials: J
authors.lastname: Chen
authors.affiliation: Shanghai Key Laboratory of Atmospheric Particle Pollution & Prevention (LAP3), Department of Environmental Science & Engineering, Fudan University , Shanghai 200433, China.
authors.forename: Xingfu
authors.initials: X
authors.lastname: Tang
mesh_terms: D000468:Alkalies / Q000737:chemistry; D002384:Catalysis; D009589:Nitrogen Oxides / Q000737:chemistry*; D013455:Sulfur / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry; D014414:Tungsten / Q000737:chemistry*; D017968:Vanadium Compounds / Q000737:chemistry*; D001335:Vehicle Emissions / Q000517:prevention & control
chemical_list: D000468:Alkalies; D009589:Nitrogen Oxides; D017968:Vanadium Compounds; D001335:Vehicle Emissions; C009495:titanium dioxide; D013455:Sulfur; C066075:vanadium pentoxide; D014025:Titanium; D014414:Tungsten