Effect of Y doping on oxygen vacancies of TiO₂ supported MnO_X for selective catalytic reduction of NO with NH₃ at low temperature

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• 作者：Shule Zhang ; Xiaoxiao Liu ; Qin Zhong ; ^{zq304@mail.njust.edu.cn} ; Yao Yao
• 关键词：SCR ; Y doping ; Charge compensation ; Oxygen vacancies ; Superoxide ions
• 刊名：Catalysis Communications
• 出版年：2012
• 期刊代码：12_15667367
• 类别：ce
• 出版时间：5 August, 2012
• 卷：25
• 期：Complete
• 页码：7-11
• 文件大小：611 K

摘要

A Y-doped TiO₂-supported MnO_X has been developed by partly substituting the Ti⁴⁺ of the catalyst with Y³⁺ to promote oxygen vacancies for charge compensation. The aim of this study was to improve the activity of low-temperature SCR of NO with NH₃ in the presence of excess oxygen by means of increasing the amount of oxygen vacancies. Analysis by PL spectra, XPS and EPR showed that Y doping increased the amount of oxygen vacancies and superoxide ions. The catalytic activity of NO removal was promoted by Y doping.