Study of Ag/CexNd1-xO2 nanocubes as soot oxidation catalysts for gasoline particulate filters: Balancing catalyst activity and stability by Nd doping

被引：94
作者：
Gao, Yuxi [2 ]
Duan, Anqi [1 ]
Liu, Shuang [1 ]
Wu, Xiaodong [2 ]
Liu, Wei [1 ]
Li, Min [3 ]
Chen, Shougang [1 ]
Wang, Xin [1 ]
Weng, Duan [2 ]
机构：
[1] Ocean Univ China, Inst Mat Sci & Engn, Qingdao 266100, Peoples R China
[2] Tsinghua Univ, Sch Mat Sci & Engn, Minist Educ China, Key Lab Adv Mat, Beijing 100084, Peoples R China
[3] Haier Grp Tech R&D Ctr, Qingdao 266100, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2017年 / 203卷
基金：
中国博士后科学基金;
关键词：
Ag/CexNd1-xO2; nanocubes; Soot oxidation; Thermal stability; Oxygen vacancies; O-x(-) and bulk oxygen; DIESEL EXHAUST CONDITIONS; CERIA-BASED CATALYSTS; AG NANOPARTICLES; OXYGEN VACANCIES; MIXED OXIDES; COMBUSTION; CEO2; AG/CEO2; SURFACE; PERFORMANCE;
D O I：
10.1016/j.apcatb.2016.10.006
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Three nanocubic Ag/CexNd1-xO2 catalysts were synthesized to evaluate the influence of Nd doping on catalyst practicability. It was observed that Nd doping generated excessive ceria surface oxygen vacancies, but reduced the bulk oxygen vacancies. These variations in oxygen vacancies suppress the utilization of ceria bulk oxygen, and induce the formation of less active O-2(-) species instead of O-2(-), resulting in a low soot oxidation activity. However, the introduction of Nd can inhibit Ag sintering and thus enhance the catalysts' thermal stability effectively. As a consequence, Ag/Ce0.95Nd0.05O2 nanocubes make a good balance between the catalyst activity and stability. Moreover, it was observed that catalyst deactivation during soot oxidation becomes more obvious when the catalysts and soot are not in close contact. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：116 / 126
页数：11
相关论文
共 44 条
  • [1] Shape-Dependent Activity of Ceria in Soot Combustion
    Aneggi, Eleonora
    Wiater, Dawid
    de Leitenburg, Carla
    Llorca, Jordi
    Trovarelli, Alessandro
    [J]. ACS CATALYSIS, 2014, 4 (01): : 172 - 181
  • [2] Soot combustion over silver-supported catalysts
    Aneggi, Eleonora
    Llorca, Jordi
    de Leitenburg, Carla
    Dolcetti, Giuliano
    Trovarelli, Alessandro
    [J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 2009, 91 (1-2) : 489 - 498
  • [3] Microwave assisted synthesis and UV-Vis spectroscopic studies of silver nanoparticles synthesized using vanillin as a reducing agent
    Aswathy, B.
    Avadhani, G. S.
    Sumithra, I. S.
    Suji, S.
    Sony, G.
    [J]. JOURNAL OF MOLECULAR LIQUIDS, 2011, 159 (02) : 165 - 169
  • [4] Structure and Morphology of Silver Nanoparticles on the (111) Surface of Cerium Oxide
    Benedetti, Francesco
    Luches, Paola
    Spadaro, Maria Chiara
    Gasperi, Gabriele
    D'Addato, Sergio
    Valeri, Sergio
    Boscherini, Federico
    [J]. JOURNAL OF PHYSICAL CHEMISTRY C, 2015, 119 (11) : 6024 - 6032
  • [5] Optical study of redox process of Ag nanoparticles at high temperature
    Bi, Huijuan
    Cai, Weiping
    Kan, Caixia
    Zhang, Lide
    Martin, D.
    Träger, F.
    [J]. Journal of Applied Physics, 2002, 92 (12) : 7491 - 7497
  • [6] Boger T., 2015, Emission Control Science and Technology, V1, P49, DOI [10.1007/s40825-015-0011-1, DOI 10.1007/S40825-015-0011-1]
  • [7] Diesel soot combustion ceria catalysts
    Bueno-Lopez, A.
    [J]. APPLIED CATALYSIS B-ENVIRONMENTAL, 2014, 146 : 1 - 11
  • [8] Silver-based catalytic materials for the simultaneous removal of soot and NOx
    Castoldi, Lidia
    Aneggi, Eleonora
    Matarrese, Roberto
    Bonzi, Rossella
    Llorca, Jordi
    Trovarelli, Alessandro
    Lietti, Luca
    [J]. CATALYSIS TODAY, 2015, 258 : 405 - 415
  • [9] Shape-dependent interplay between oxygen vacancies and Ag-CeO2 interaction in Ag/CeO2 catalysts and their influence on the catalytic activity
    Chang, Sujie
    Li, Mo
    Hua, Qing
    Zhang, Lijuan
    Ma, Yunsheng
    Ye, Bangjiao
    Huang, Weixin
    [J]. JOURNAL OF CATALYSIS, 2012, 293 : 195 - 204
  • [10] Highly Enhanced Concentration and Stability of Reactive Ce3+ on Doped CeO2 Surface Revealed In Operando
    Chueh, William C.
    McDaniel, Anthony H.
    Grass, Michael E.
    Hao, Yong
    Jabeen, Naila
    Liu, Zhi
    Haile, Sossina M.
    McCarty, Kevin F.
    Bluhm, Hendrik
    El Gabaly, Farid
    [J]. CHEMISTRY OF MATERIALS, 2012, 24 (10) : 1876 - 1882
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