Preparation of nanometric CeO2-ZrO2-Nd2O3 solid solution and its catalytic performances

被引：54

作者：

Guo, Jiaxiu ^{[1
]}

Wu, Dongdong ^{[1
]}

Zhang, Lei ^{[1
]}

Gong, Maochu ^{[1
]}

Zhao, Ming ^{[1
]}

Chen, Yaoqiang ^{[1
]}

机构：

[1] Sichuan Univ, Coll Chem, Key Lab Green Chem Technol, State Educ Minist, Chengdu 610064, Sichuan, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 460卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

CeO2-ZrO2-Nd2O3; CeO2-ZrO2; nanoparticle; catalytic activity;

D O I：

10.1016/j.jallcom.2007.05.088

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 [物理化学]; 081704 [应用化学];

摘要：

A kind of nanometric CeO2-ZrO2-Nd2O3 (CZN) solid solution for a carrier in the automotive three-way catalysts was synthesized by a coprecipitation method and characterized by means of X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), nitrogen adsorption-desorption (BET), scanning electron microscopy (SEM) and oxygen storage capacity (OSC). For the purpose of comparison, an unincorporated CeO2-ZrO2 (CZ) was also synthesized. The XRD measurements disclose the prepared CeO2-ZrO2-Nd2O3 have a face-centered cubic fluorite structure and nanoparticle sizes. According to the results of XPS, Nd3+ ions can enter the CZ lattice and form a homogenous solid solution. Oxygen storage capacity measurements reveal that CeO2-ZrO2-Nd2O3 display high oxygen mobility at a low temperature. The results of the activity tests show that the catalyst exhibits good three-way catalytic activity and fairly wide range of air-to-fuel ratios. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：485 / 490

页数：6

共 16 条

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Kinetics and mechanism of the reduction of NO by C3H8 over Pt/Al2O3 under lean-burn conditions [J].