Design of MoFe/Beta@CeO₂ catalysts with a core−shell structure and their catalytic performances for the selective catalytic reduction of NO with NH₃

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• 作者：Jixing Liu^a ; Yuhao Du^a ; Jian Liu^a ; ^{liujian@cup.edu.cn} ; Zhen Zhao^a ; Kai Cheng^a ; Yongsheng Chen^b ; Yuechang Wei^a ; Weiyu Song^a ; Xiao Zhang^a
• 关键词：MoFe/Beta ; CeO2 ; Core&minus ; shell ; SO2 tolerance ; Selective catalytic reduction
• 刊名：Applied Catalysis B: Environmental
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：203
• 期：Complete
• 页码：704-714
• 全文大小：3077 K
• 卷排序：203

文摘

MoFe/Beta@CeO2 core-shell catalyst has been controllably synthesized by a self-assembly method. MoFe/Beta@CeO2 shows a remarkable improvement of deNOx activity, excellent SO2 and H2O tolerance and high thermal stability. CeO2 sheaths have inhibited the generation of ammonium sulfate and nitrate species from blocking the active sites. CeO2 shells have served as an effective barrier to prevent the aggregation of metal oxide NPs. The CeO2 shells promote the formation of nitrites species and NO oxidation to NO2.