Effect of Y doping on oxygen vacancies of TiO2 supported MnOX for selective catalytic reduction of NO with NH3 at low temperature
Effect of Y doping on oxygen vacancies of TiO2 supported MnOX for selective catalytic reduction of NO with NH3 at low temperature
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DOI：
10.1016/j.catcom.2012.03.026
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发表时间：
2012-08
影响因子：
3.7
通讯作者：
Shule Zhang;Xiaoxiao Liu;Q. Zhong;Yao Yao-Yao
中科院分区：
文献类型：
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作者：
Shule Zhang;Xiaoxiao Liu;Q. Zhong;Yao Yao-Yao
通过Y ~（3+）部分取代催化剂中的Ti ~（4+），促进氧空位的形成，实现了负载型MnO ~（2+）催化剂的电荷补偿。研究了在过量氧存在下，通过增加催化剂中氧空位的数量来提高NH3低温选择性催化还原NO的活性。PL谱、XPS和EPR分析表明，Y掺杂增加了氧空位和超氧阴离子的数量。Y掺杂提高了催化剂的NO脱除活性。
A Y-doped TiO2-supported MnOXhas 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 NH3in 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.