Enhancement in CO oxidation activity of nanosized CexZr1-xO2 solid solutions by incorporation of additional dopants

被引：23

作者：

Bharali, Pankaj ^{[1
,2
]}

Saikia, Pranjal ^{[1
,3
]}

Katta, Lakshmi ^{[1
]}

Reddy, Benjaram M. ^{[1
]}

机构：

[1] CSIR Indian Inst Chem Technol, Inorgan & Phys Chem Div, Hyderabad 500607, Andhra Pradesh, India

[2] Tezpur Univ, Dept Chem Sci, Napaam 784028, Assam, India

[3] Gauhati Univ, IST, Dept Chem Sci, Gauhati 781014, Assam, India

来源：

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2013年 / 19卷 / 01期

关键词：

Ceria-zirconia; Dopant cations; XRD; TEM; Raman spectra; CO-TPR; CO oxidation; OXYGEN STORAGE CAPACITY; X-RAY-DIFFRACTION; MIXED OXIDES; THERMAL-STABILITY; REDOX PROPERTIES; 3-WAY CATALYSTS; STRUCTURAL-CHARACTERIZATION; CERIA; RAMAN; SURFACE;

D O I：

10.1016/j.jiec.2012.08.021

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The influence of Hf, Pr and Tb dopant cations on structural and catalytic properties of nanosized CexZr1-xO2 solid solutions has been investigated. A wide range of analytical techniques are utilized to characterize the synthesized materials, and the catalytic activity is evaluated for CO oxidation. XRD, Raman, SEM and TEM results suggested formation of dopant cation incorporated ceria-zirconia solid solutions with highly homogeneous morphology and lattice defects. The CO-TPR measurements revealed an enhanced reducibility of CexZr1-xO2 which is reflected in their better catalytic activity. The role of Tb4+/Tb3+ and Pr4+/Pr3+ redox couples in facilitating a higher activity has been addressed. (C) 2012 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

引用

页码：327 / 336

页数：10

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[1] Surface-structure sensitivity of CO oxidation over polycrystalline ceria powders [J].