Active manganese oxide on MnOx-CeO2 catalysts for low-temperature NO oxidation:Characterization and kinetics study

查看全文 作　　者：Lingkun [1]Meng;Jun [1]Wang;Zhihui [1]Sun;Jinxin [1]Zhu;Hang [1]Li;Jianqiang [1]Wang;Meiqing [1,2,3]Shen

机构地区：[1]Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering & Technology, Tianjin University,Tianjin 300072, China;[2]Collaborative Innovation Centre of Chemistry Science and Engineering (Tianjin), Tianjin 300072, China;[3]State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China

出　　处：《Journal of Rare Earths》索引2018年第36卷第2期,共6页

基　　金：Project supported by the National key research and development program(2016YFC0204901);the National Natural Science Foundation of China(21576207);the introduction of talent and technology cooperation plan of Tianjin(14RCGFGX00849) 摘　　要：MnO_x-CeO_2 catalysts were synthesized to investigate the active sites for NO oxidation by varying the calcination temperature. XRD and TEM results showed that cubic CeO_2 and amorphous MnO_x existed in MnO_x-CeO_2 catalysts. High temperature calcination caused the sintering of amorphous MnO_x and transforming to bulk crystalline Mn_2O_3, H_2-TPR and XPS results suggested the valence of Mn in MnO_x-CeO_2 was higher than pure MnO_x, and decreased with the increasing calcination temperature, The turnover frequency(TOF) was calculated based on the initial reducibility according to H_2-TPR quantitation and kinetic study. The TOF results indicated that the initial reducibility of amorphous MnO_x with high valence manganese ions was equivalent to the active sites for NO oxidation. It can be inferred that the amorphous MnO_x plays a key role in low-temperature NO oxidation. 关键词：锰氧化物催化剂低温度学习动力学锻烧温度非结晶 TOF

相关文献

参考文献（39）
引证文献（9）
耦合文献（81）

参考文献(39)

引证文献(9)

耦合文献(81)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Active manganese oxide on MnOx-CeO2 catalysts for low-temperature NO oxidation:Characterization and kinetics study

参考文献(39)

引证文献(9)

耦合文献(81)

用户提示