One-step synthesized SO42--TiO2 with exposed (001) facets and its application in selective catalytic reduction of NO by NH3

doi:10.1016/S1872-2067(18)63034-7

Abstract

Abstract:

A sample of sulfated anatase TiO₂ with high-energy (001) facets (TiO₂-001) was prepared by a simple one-step hydrothermal route using SO₄^2- as a morphology-controlling agent. After doping ceria, Ce/TiO₂-001 was used as the catalyst for selective catalytic reduction (SCR) of NO with NH₃. Compared with Ce/P25 (Degussa P25 TiO₂) and Ce/P25-S (sulfated P25) catalysts, Ce/TiO₂-001 was more suitable for medium-and high-temperature SCR of NO due to the high surface area, sulfation, and the excellent properties of the active-energy (001) facets. All of these facilitated the generation of abundant acidity, chemisorbed oxygen, and activated NO_x-adsorption species, which were the important factors for the SCR reaction.

Key words: Anatase TiO₂, Sulfation, (001) facets, Ceria, Selective catalytic reduction

Yexuan Wen, Shuang Cao, Xiaoqi Fei, Haiqiang Wang, Zhongbiao Wu. One-step synthesized SO₄^2--TiO₂ with exposed (001) facets and its application in selective catalytic reduction of NO by NH₃[J]. Chinese Journal of Catalysis, 2018, 39(4): 771-778.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(18)63034-7

https://www.cjcatal.com/EN/Y2018/V39/I4/771

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One-step synthesized SO₄^2--TiO₂ with exposed (001) facets and its application in selective catalytic reduction of NO by NH₃

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