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.
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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: 134–142
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): 176–183
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): 307–324
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: 1110–1118
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): 437–496
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: 75–96
Diehl F, Barbier J, Duprez D, et al. Catalytic oxidation of heavy hydrocarbons over Pt/Al2O3. Oxidation of C +10 solid hydrocarbons representative of soluble organic fraction of Diesel soots. Applied Catalysis A: General 2015, 504: 37–43
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: 227–237
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: 157–169
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: 244–251
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: 209–221
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: 164–172
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: 272–281
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): 101–108
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: 43–53
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: 18–28
Mukherjee D, Reddy B. M Noble metal-free CeO2-based mixed oxides for CO and soot oxidation. Catalysis Today 2018, 309: 227–235
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: 204–215
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: 58–68
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: 214–226
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: 251–262
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: 544–556
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): 1419–1423
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: 20–28
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): 1621–1631
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: 250–261
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: 13–29
Aneggi E, Wiater D, de Leitenburg C, et al. Shape-dependent activity of ceria in soot combustion. ACS Catalysis 2014, 4(1): 172–181
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): 4495–4510
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): 1629–1641
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: 454–459
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: 188–198
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: 48–52
Shao W, Wang Z, Zhang X, et al. Promotion effects of cesium on perovskite oxides for catalytic soot combustion. Catalysis Letters 2016, 146(8): 1397–1407
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: 579–587
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: 278–289
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: 231–240
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Zeng, L., Cui, L., Wang, C. et al. Ag-assisted CeO2 catalyst for soot oxidation. Front. Mater. Sci. 13, 288–295 (2019). https://doi.org/10.1007/s11706-019-0470-3
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DOI: https://doi.org/10.1007/s11706-019-0470-3