Solvothermal synthesis and characterization of ceria-zirconia mixed oxides for catalytic applications

被引：26

作者：

Devaraju, M. K. ^{[1
]}

Liu, Xiangwen ^{[1
]}

Yusuke, Kikuchi ^{[1
]}

Yin, S. ^{[1
]}

Sato, T. ^{[1
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, Sendai, Miyagi 9808577, Japan

来源：

NANOTECHNOLOGY | 2009年 / 20卷 / 40期

关键词：

OXYGEN STORAGE CAPACITY; PARTIAL OXIDATION; SOLID-SOLUTIONS; BEHAVIOR; METHANE;

D O I：

10.1088/0957-4484/20/40/405606

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Solvothermal synthesis under supercritical conditions (400 degrees C) and high autogenous pressure (about 40 MPa), has been carried out for the direct preparation of nanocrystalline powders of CeO2, Ce0.85Zr0.15O2, Ce0.75Zr0.25O2, Ce0.65Zr0.35O2 and Ce0.5Zr0.5O2 which are characterized for applications as catalysts for oxygen storage in automotive catalysis. The synthesis was carried out in the presence of polyethylene glycol and water. For the characterization, x-ray diffraction (XRD), transmission electron microscopy (TEM), dynamic light scattering (DLS) and the Brunauer-Emmet-Teller (BET) technique were employed. The oxygen storage capacity (OSC) of as-prepared and calcined samples without loading of noble metals was measured using thermogravimetric-differential thermal analysis (TG-DTA) at 600 degrees C with a continuous flow of CO-N-2 gas and air alternately. Ce0.5Zr0.5O2 nanoparticles with a BET surface area of 102 m(2) g(-1) exhibited the highest OSC of 0.073 50 mol-O-2/mol-CeO2. The OSC values obtained increased with increasing the amount of ZrO2 doping in the samples.

引用

页数：6

共 24 条

[1]

ADACHI GY, 2002, SYNTHESIS MODIFICATI, P51

[2] Continuous hydrothermal synthesis of inorganic materials in a near-critical water flow reactor;: the one-step synthesis of nano-particulate Ce1-xZrxO2 (x=0-1) solid solutions [J].

Cabañas, A ;

Darr, JA ;

Lester, E ;

Poliakoff, M .

JOURNAL OF MATERIALS CHEMISTRY, 2001, 11 (02) :561-568

[3] Solvothermal synthesis, controlled morphology and optical properties of Y2O3:EU3+ nanocrystals [J].

Devaraju, M. K. ;

Yin, Shu ;

Sato, Tsugio .

JOURNAL OF CRYSTAL GROWTH, 2009, 311 (03) :580-584

[4] A Fast and Template Free Synthesis of Tb:Y2O3 Hollow Microspheres Via Supercritical Solvothermal Method [J].

Devaraju, M. Kempaiah ;

Yin, Shu ;

Sato, Tsugio .

CRYSTAL GROWTH & DESIGN, 2009, 9 (06) :2944-2949

[5] Catalytic converters: state of the art and perspectives [J].

Farrauto, RJ ;

Heck, RM .

CATALYSIS TODAY, 1999, 51 (3-4) :351-360

[6] RH-LOADED CEO2-ZRO2 SOLID-SOLUTIONS AS HIGHLY EFFICIENT OXYGEN EXCHANGERS - DEPENDENCE OF THE REDUCTION BEHAVIOR AND THE OXYGEN STORAGE CAPACITY ON THE STRUCTURAL-PROPERTIES [J].

FORNASIERO, P ;

DIMONTE, R ;

RAO, GR ;

KASPAR, J ;

MERIANI, S ;

TROVARELLI, A ;

GRAZIANI, M .

JOURNAL OF CATALYSIS, 1995, 151 (01) :168-177

[7] Pd-, Pt-, and Rh-loaded Ce0.6Zr0.35Y0.05O2 three-way catalysts:: An investigation on performance and redox properties [J].

He, H ;

Dai, HX ;

Ng, LH ;

Wong, KW ;

Au, CT .

JOURNAL OF CATALYSIS, 2002, 206 (01) :1-13

[8] Low-temperature direct synthesis of nanoparticles of fluorite-type ceria-zirconia solid solutions by "forced cohydrolysis at 100°C [J].

Hirano, M ;

Miwa, T ;

Inagaki, M .

JOURNAL OF SOLID STATE CHEMISTRY, 2001, 158 (01) :112-117

[9]

JEONG RK, 2007, APPL CATAL B-ENVIRON, V71, P57

[10] Oxidation behavior of reduced (CeO2)1-x-(ZrO2)x (x=0, 0.2, 0.5) catalysts [J].

Kakuta, N ;

Ikawa, S ;

Eguchi, T ;

Murakami, K ;

Ohkita, H ;

Mizushima, T .

JOURNAL OF ALLOYS AND COMPOUNDS, 2006, 408 :1078-1083

← 1 2 3 →