VO X supported on TiO2-Ce0.9Zr0.1O2 core-shell structure catalyst for NH3-SCR of NO

Lvesheng Sun; Shunxin Cao; Yun Huang; Yiming Zhang; Youhong Xiao; Guojun Dong; Yu Su

doi:10.1039/c9ra05024h

VO _X supported on TiO₂-Ce_0.9Zr_0.1O₂ core-shell structure catalyst for NH₃-SCR of NO

RSC Adv. 2019 Sep 25;9(52):30340-30349. doi: 10.1039/c9ra05024h. eCollection 2019 Sep 23.

Authors

Lvesheng Sun¹, Shunxin Cao¹, Yun Huang¹, Yiming Zhang¹, Youhong Xiao², Guojun Dong¹, Yu Su³

Affiliations

¹ College of Materials Science and Chemical Engineering, Key Laboratory of Superlight Materials and Surface Technology of Education Ministry, Harbin Engineering University 150001 Harbin Heilongjiang P. R. China dgj1129@163.com.
² College of Power and Energy Engineering of Harbin Engineering University 150001 Harbin Heilongjiang P. R. China.
³ School of Chemistry, Chemical Engineering and Materials of Heilongjiang University 150080 Harbin Heilongjiang P. R. China 2003086@hlju.edu.cn.

Abstract

In this experiment, a TiO₂-Ce_0.9Zr_0.1O₂ support with core-shell structure was successfully prepared by a precipitation method and VO _X /TiO₂-Ce_0.9Zr_0.1O₂ catalyst was prepared by an impregnation method, and the catalyst was used to catalyze the NH₃-SCR of NO. Based on the results of HRTEM, XRD, BET, H₂-TPR, NH₃-TPD, XPS, Py-IR, it was speculated that due to the interaction between TiO₂ and Ce_0.9Zr_0.1O₂, more oxygen vacancies and Ce³⁺ are generated, which are beneficial to the existence of low-valence V by electron transfer between high valence state V and Ce³⁺and increase the acidic sites on the catalyst surface. The catalytic activity (>97%) of the VO _X /TiO₂-Ce_0.9Zr_0.1O₂ catalyst is superior to the current commercial catalyst (V₂O₅-WO₃/TiO₂) and has a higher N₂ selectivity (>97.5%) at 40 000 h^-1 GHSV and 250-400 °C.