Chemical Removal of CeO2 Segregated on the Surface of CeO2-ZrO2 Binary Oxides for Improvement of OSC

被引：1
|
作者：
Kakuta, Noriyoshi [1 ]
Sugino, Youko [1 ]
Rachi, Hironobu [1 ]
Ohkita, Hironobu [1 ]
Mizushima, Takanori [1 ]
机构：
[1] Toyohashi Univ Technol, Dept Mat Sci, Tempaku Ku, Toyohashi, Aichi 4418580, Japan
来源：
TOPICS IN CATALYSIS | 2009年 / 52卷 / 13-20期
关键词：
CeO2; HNO3/H2O2; treatment; OSC; CeO2-ZrO2; OXYGEN STORAGE CAPACITY; MIXED OXIDES; CATALYSTS; BEHAVIOR; MICROSTRUCTURE; PERFORMANCE; OXIDATION; SR;
D O I：
10.1007/s11244-009-9368-0
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A chemical treatment to remove residual CeO2 phase on CeO2-ZrO2 (CZ) solid solution was carried out. A CZ was treated by H2O2 for the reduction of Ce4+ to Ce3+ and then HNO3 for the dissolution of Ce3+ compounds (H-CZ). H-2-TPR, TEM-EDX and XPS analyses revealed the removal of CeO2 phase and the homogeneous distribution of Ce species. About 20% improvement in oxygen storage capacity (OSC) of H-CZ was confirmed at 773 K by the weight measurements under H-2/N-2 and air atmospheres, indicating that the HNO3/H2O2 treatment was effective to avoid the deterioration of the OSC by segregated CeO2 on the CZ binary oxides.
引用
收藏
页码：1888 / 1892
页数：5
相关论文
共 50 条
  • [1] Chemical Removal of CeO2 Segregated on the Surface of CeO2–ZrO2 Binary Oxides for Improvement of OSC
    Noriyoshi Kakuta
    Youko Sugino
    Hironobu Rachi
    Hironobu Ohkita
    Takanori Mizushima
    Topics in Catalysis, 2009, 52
  • [2] CeO2-ZrO2 binary oxides for NOx removal by sorption
    Haneda, M
    Morita, T
    Nagao, Y
    Kintaichi, Y
    Hamada, H
    PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2001, 3 (21) : 4696 - 4700
  • [3] Comparative study on methane oxidation over CeO2, ZrO2 and CeO2-ZrO2 mixed oxides
    Roh, HS
    Jun, KW
    Baek, SC
    JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, 2003, 9 (02) : 168 - 173
  • [4] In situ electron microscopy of CeO2 and CeO2-ZrO2 reduction
    Sharma, R
    Crozier, P
    ELECTRON MICROSCOPY AND ANALYSIS 1999, 1999, (161): : 569 - 572
  • [5] Nanostructured CeO2-ZrO2 mixed oxides
    Di Monte, R
    Kaspar, J
    JOURNAL OF MATERIALS CHEMISTRY, 2005, 15 (06) : 633 - 648
  • [6] Reduction of high surface area CeO2-ZrO2 mixed oxides
    Daturi, M
    Finocchio, E
    Binet, C
    Lavalley, JC
    Fally, F
    Perrichon, V
    Vidal, H
    Hickey, N
    Kaspar, J
    JOURNAL OF PHYSICAL CHEMISTRY B, 2000, 104 (39): : 9186 - 9194
  • [7] Local structure in CeO2 and CeO2-ZrO2 nanoparticles probed by Eu luminescence
    Parvulescu, Vasile I.
    Tiseanu, Carmen
    CATALYSIS TODAY, 2015, 253 : 33 - 39
  • [8] Influence of the oxygen partial pressure on the reduction of CeO2 and CeO2-ZrO2 ceramics
    Huang, S
    Li, L
    Van der Biest, O
    Vleugels, J
    SOLID STATE SCIENCES, 2005, 7 (05) : 539 - 544
  • [9] The effect of CeO2 on the surface and catalytic properties of Pt/CeO2-ZrO2 catalysts for methane dry reforming
    Damyanova, S.
    Pawelec, B.
    Arishtirova, K.
    Martinez Huerta, M. V.
    Fierro, J. L. G.
    APPLIED CATALYSIS B-ENVIRONMENTAL, 2009, 89 (1-2) : 149 - 159
  • [10] Comparative sulfur storage on Pt catalysts:: effect of the support (CeO2, ZrO2 and CeO2-ZrO2)
    Bazin, P
    Saur, O
    Lavalley, JC
    Le Govic, AM
    Blanchard, G
    CATALYSIS AND AUTOMOTIVE POLLUTION CONTROL IV, 1998, 116 : 571 - 579
12345