Advertisement

Ag-assisted CeO2 catalyst for soot oxidation

  • Lirong Zeng
  • Lan Cui
  • Caiyun Wang
  • Wei Guo
  • Cairong GongEmail author
Research Article
  • 4 Downloads

Abstract

In this work, the Ag loaded Ce-based catalyst was synthesized (by the sol-gel method) and its performance was studied by TG, H2-TPR, XRD, SEM, TEM, BET and XPS. The results show that Ag nanoparticles be successfully loaded onto the CeO2 surface and the relative content of Ag nanoparticles is about 10.22 wt.% close to the theoretical value (10%). XPS shows that Ag nanoparticles induce a great number of oxygen vacancies in the CeO2 lattice through the electronic transfer, and H2-TPR indicates that the Ag-assisted CeO2 catalyst exhibits a better reduction performance and Ag nanoparticles can promote O- transform into O2-. The catalytic activity for soot oxidation was studied by TG under air atmosphere and the activity was found to be obviously enhanced when Ag nanoparticles be load on the surface of CeO2 (T10 = 386 °C, T90 = 472.5 °C, Tm = 431 °C). The reaction mechanism was also presented and O 2 - species is regarded as the determinant factor for the catalytic activity.

Keywords

soot oxidation CeO2 oxygen vacancy 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    He H, Lin X, Li S, et al. The key surface species and oxygen vacancies in MnOx(0.4)-CeO2 toward repeated soot oxidation. Applied Catalysis B: Environmental 2018, 223: 134–142CrossRefGoogle Scholar
  2. [2]
    Li Q, Wang X, Chang W, et al. Promotional effects of cerium doping and NOx on the catalytic soot combustion over MnMgAlO hydrotalcite-based mixed oxides. Journal of Rare Earths 2014, 32(2): 176–183CrossRefGoogle Scholar
  3. [3]
    Messerer A, Niessner R, Pöschl U. Comprehensive kinetic characterization of the oxidation and gasification of model and real diesel soot by nitrogen oxides and oxygen under engine exhaust conditions: Measurement, Langmuir-Hinshelwood, and Arrhenius parameters. Carbon 2006, 44(2): 307–324CrossRefGoogle Scholar
  4. [4]
    Ma C, Gao J, Zhong L, et al. Experimental investigation of the oxidation behaviour and thermal kinetics of diesel particulate matter with non-thermal plasma. Applied Thermal Engineering 2016, 99: 1110–1118CrossRefGoogle Scholar
  5. [5]
    Dhal G C, Dey S, Mohan D, et al. Simultaneous abatement of diesel soot and NOX emissions by effective catalysts at low temperature: An overview. Catalysis Reviews 2018, 60(3): 437–496CrossRefGoogle Scholar
  6. [6]
    Fino D, Bensaid S, Piumetti M, et al. A review on the catalytic combustion of soot in Diesel particulate filters for automotive applications: From powder catalysts to structured reactors. Applied Catalysis A: General 2016, 509: 75–96CrossRefGoogle Scholar
  7. [7]
    Diehl F, Barbier J, Duprez D, et al. Catalytic oxidation of heavy hydrocarbons over Pt/Al2O3. Oxidation of C10+ solid hydrocarbons representative of soluble organic fraction of Diesel soots. Applied Catalysis A: General 2015, 504: 37–43Google Scholar
  8. [8]
    Ji F, Men Y, Wang J, et al. Promoting diesel soot combustion efficiency by tailoring the shapes and crystal facets of nanoscale Mn3O4. Applied Catalysis B: Environmental 2019, 242: 227–237CrossRefGoogle Scholar
  9. [9]
    Urán L, Gallego J, Li W Y, et al. Effect of catalyst preparation for the simultaneous removal of soot and NOx. Applied Catalysis A: General 2019, 569: 157–169CrossRefGoogle Scholar
  10. [10]
    Yang L, Zhang C, Shu X, et al. The mechanism of Pd, K co-doping on Mg-Al hydrotalcite for simultaneous removal of diesel soot and NOx in SO2-containing atmosphere. Fuel 2019, 240: 244–251CrossRefGoogle Scholar
  11. [11]
    Jampaiah D, Velisoju V K, Devaiah D, et al. Flower-like Mn3O4/CeO2 microspheres as an efficient catalyst for diesel soot and CO oxidation: Synergistic effects for enhanced catalytic performance. Applied Surface Science 2019, 473: 209–221CrossRefGoogle Scholar
  12. [12]
    Shen Q, Lu G, Du C, et al. Role and reduction of NOx in the catalytic combustion of soot over iron-ceria mixed oxide catalyst. Chemical Engineering Journal 2013, 218: 164–172CrossRefGoogle Scholar
  13. [13]
    Lu P, Li C, Zeng G, et al. Research on soot of black smoke from ceramic furnace flue gas: characterization of soot. Journal of Hazardous Materials 2012, 199–200: 272–281CrossRefGoogle Scholar
  14. [14]
    Katta L, Sudarsanam P, Thrimurthulu G, et al. Doped nanosized ceria solid solutions for low temperature soot oxidation: Zirconium versus lanthanum promoters. Applied Catalysis B: Environmental 2010, 101(1–2): 101–108CrossRefGoogle Scholar
  15. [15]
    Wu Y, Li L, Chu B, et al. Catalytic reduction of NO by CO over Bsite partially substituted LaM0.25Co0.75O3 (M = Cu, Mn, Fe) perovskite oxide catalysts: The correlation between physicochemical properties and catalytic performance. Applied Catalysis A: General 2018, 568: 43–53CrossRefGoogle Scholar
  16. [16]
    Lykaki M, Pachatouridou E, Carabineiro S A C, et al. Ceria nanoparticles shape effects on the structural defects and surface chemistry: Implications in CO oxidation by Cu/CeO2 catalysts. Applied Catalysis B: Environmental 2018, 230: 18–28CrossRefGoogle Scholar
  17. [17]
    Mukherjee D, Reddy B. M Noble metal-free CeO2-based mixed oxides for CO and soot oxidation. Catalysis Today 2018, 309: 227–235CrossRefGoogle Scholar
  18. [18]
    Zhang H, Hu W, Zhou C, et al. A new understanding of CeO2-ZrO2 catalysts calcinated at different temperatures: Reduction property and soot-O2 reaction. Applied Catalysis A: General 2018, 563: 204–215CrossRefGoogle Scholar
  19. [19]
    Nascimento L F, Lima J F, de Sousa Filho P C, et al. Effect of lanthanum loading on nanosized CeO2-ZnO solid catalysts supported on cordierite for diesel soot oxidation. Journal of Environmental Sciences (China) 2018, 73: 58–68CrossRefGoogle Scholar
  20. [20]
    Zhai G, Wang J, Chen Z, et al. Highly enhanced soot oxidation activity over 3DOM Co3O4-CeO2 catalysts by synergistic promoting effect. Journal of Hazardous Materials 2019, 363: 214–226CrossRefGoogle Scholar
  21. [21]
    Wang H, Jin B, Wang H, et al. Study of Ag promoted Fe2O3@CeO2 as superior soot oxidation catalysts: The role of Fe2O3 crystal plane and tandem oxygen delivery. Applied Catalysis B: Environmental 2018, 237: 251–262CrossRefGoogle Scholar
  22. [22]
    Liu L, Shi J, Wang R, et al. Fabrication of double-shelled Fe2O3/CeO2 boxes from CeO2-modified Prussian blue and their enhanced performances for CO removal and water treatment. Journal of Alloys and Compounds 2017, 725: 544–556CrossRefGoogle Scholar
  23. [23]
    Nie L, Mei D, Xiong H, et al. Activation of surface lattice oxygen in single-atom Pt/CeO2 for low-temperature CO oxidation. Science 2017, 358(6369): 1419–1423CrossRefGoogle Scholar
  24. [24]
    Huang X, Zhao G, Chang Y, et al. Nanocrystalline CeO2-δ coated β-MnO2 nanorods with enhanced oxygen transfer property. Applied Surface Science 2018, 440: 20–28CrossRefGoogle Scholar
  25. [25]
    Gao Y, Wu X, Nord R, et al. Sulphation and ammonia regeneration of a Pt/MnOx-CeO2/Al2O3 catalyst for NOx-assisted soot oxidation. Catalysis Science & Technology 2018, 8(6): 1621–1631CrossRefGoogle Scholar
  26. [26]
    Wei Y, Liu J, Zhao Z, et al. Structural and synergistic effects of three-dimensionally ordered macroporous Ce0.8Zr0.2O2-supported Pt nanoparticles on the catalytic performance for soot combustion. Applied Catalysis A: General 2013, 453: 250–261CrossRefGoogle Scholar
  27. [27]
    Wei Y, Liu J, Zhao Z, et al. The catalysts of three-dimensionally ordered macroporous Ce1-xZrxO2-supported gold nanoparticles for soot combustion: The metal-support interaction. Journal of Catalysis 2012, 287: 13–29CrossRefGoogle Scholar
  28. [28]
    Aneggi E, Wiater D, de Leitenburg C, et al. Shape-dependent activity of ceria in soot combustion. ACS Catalysis 2014, 4(1): 172–181CrossRefGoogle Scholar
  29. [29]
    Ai L, Wang Z, Gao Y, et al. Effect of surface and bulk palladium doping on the catalytic activity of La2Sn2O7 pyrochlore oxides for diesel soot oxidation. Journal of Materials Science 2019, 54(6): 4495–4510CrossRefGoogle Scholar
  30. [30]
    Jin B, Wei Y, Zhao Z, et al. Three-dimensionally ordered macroporous CeO2/Al2O3-supported Au nanoparticle catalysts: Effects of CeO2 nanolayers on catalytic activity in soot oxidation. Chinese Journal of Catalysis 2017, 38(9): 1629–1641CrossRefGoogle Scholar
  31. [31]
    Liu S, Wu X, Tang J, et al. An exploration of soot oxidation over CeO2-ZrO2 nanocubes: Do more surface oxygen vacancies benefit the reaction? Catalysis Today, 2017, 281: 454–459CrossRefGoogle Scholar
  32. [32]
    Liu S, Wu X, Liu W, et al. Soot oxidation over CeO2 and Ag/CeO2: Factors determining the catalyst activity and stability during reaction. Journal of Catalysis 2016, 337: 188–198CrossRefGoogle Scholar
  33. [33]
    Kim W K, Han D W, Ryu W H, et al. Effects of Cl doping on the structural and electrochemical properties of high voltage LiMn1.5-Ni0.5O4 cathode materials for Li-ion batteries. Journal of Alloys and Compounds 2014, 592: 48–52CrossRefGoogle Scholar
  34. [34]
    Shao W, Wang Z, Zhang X, et al. Promotion effects of cesium on perovskite oxides for catalytic soot combustion. Catalysis Letters 2016, 146(8): 1397–1407CrossRefGoogle Scholar
  35. [35]
    Jin B, Wu X, Weng D, et al. Roles of cobalt and cerium species in three-dimensionally ordered macroporous CoxCe1-xOδ catalysts for the catalytic oxidation of diesel soot. Journal of Colloid and Interface Science 2018, 532: 579–587CrossRefGoogle Scholar
  36. [36]
    Guo X, Meng M, Dai F, et al. NOx-assisted soot combustion over dually substituted perovskite catalysts La1-xKxCo1-yPdyO3-δ. Applied Catalysis B: Environmental 2013, 142–143: 278–289CrossRefGoogle Scholar
  37. [37]
    Liu M, Wu X, Liu S, et al. Study of Ag/CeO2 catalysts for naphthalene oxidation: Balancing the oxygen availability and oxygen regeneration capacity. Applied Catalysis B: Environmental 2017, 219: 231–240CrossRefGoogle Scholar

Copyright information

© Higher Education Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Lirong Zeng
    • 1
  • Lan Cui
    • 2
  • Caiyun Wang
    • 1
  • Wei Guo
    • 1
  • Cairong Gong
    • 1
    Email author
  1. 1.Institute of New Energy, School of Materials Science and EngineeringTianjin UniversityTianjinChina
  2. 2.Center of AnalysisTianjin UniversityTianjinChina

Personalised recommendations