Efficiency of Cu and Pd substitution in Fe-based perovskites to promote N₂ formation during NH₃ selective catalytic oxidation (NH₃-SCO)

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• 作者：Peixin Li^a ; Runduo Zhang^a ; ^{zhangrd@mail.buct.edu.cn} ; Ning Liu^a ; Sé ; bastien Royer^b
• 关键词：NH3-SCO ; Perovskite ; Mechanism ; Palladium substitution
• 刊名：Applied Catalysis B: Environmental
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：203
• 期：Complete
• 页码：174-188
• 全文大小：2877 K
• 卷排序：203

文摘

Cu2+ and Pd2+ substitutions in LaFeO3 allow to promote ammonia conversion by improving reducibility of the materials. Pd2+ substituted sample shows the best NH3-SCO performance among perovskites in view of NH3 conversion and N2 yield. The dispersion of perovskite over alumina is beneficial for the enhancement of N2 selectivity at high temperature (400–600 °C). NH3-SCO mechanism over Pd2+ substituted perovskite is proposed in which NO bond cleavage is evidenced as the rate-determining step for N2 formation.