Enhanced CO and Soot Oxidation Activity over Y-Doped Ceria-Zirconia and Ceria-Lanthana Solid Solutions

D. Devaiah; T. Tsuzuki; C. U. Aniz; B. M. Reddy

doi:10.1007/s10562-015-1507-6

Enhanced CO and Soot Oxidation Activity over Y-Doped Ceria-Zirconia and Ceria-Lanthana Solid Solutions

D. Devaiah, T. Tsuzuki, C. U. Aniz, B. M. Reddy^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

Y-doped ceria-zirconia (Ce_0.8Zr_0.12Y_0.08O_2-δ, CZY) and ceria-lanthana (Ce_0.8La_0.12Y_0.08O_2-δ, CLY) ternary oxide solid solutions were synthesized by a facile coprecipitation method. Structural, textural, redox, and morphological properties of the synthesized samples were investigated by means of X-ray diffraction (XRD), inductively coupled plasma-optical emission spectroscopy (ICP-OES), Raman spectroscopy (RS), UV-visible diffuse reflectance spectroscopy (UV-vis DRS), X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction by hydrogen (H₂-TPR), high resolution transmission electron microscopy (HRTEM), and Brunauer-Emmett-Teller surface area (BET SA) techniques. The formation of ternary oxide solid solutions was confirmed from XRD, RS, and UV-vis DRS results. ICP-OES analysis confirmed the elemental composition in the ternary oxide solid solutions. HRTEM images revealed irregular morphology of the samples. RS, UV-vis DRS, and XPS results indicated enhanced oxygen vacancies in the Y doped samples. H₂-TPR profiles confirmed a facile reduction of CZY and CLY samples at lower temperatures. BET analysis revealed an enhanced surface area for CZY and CLY samples than the respective CZ and CL undoped mixed oxides. All these factors contributed to a better CO and soot oxidation performance of CZY and CLY samples. Particularly, the CLY sample exhibited highest catalytic activity among the various samples investigated. (Graph Presented).

Original language	English
Pages (from-to)	1206-1216
Number of pages	11
Journal	Catalysis Letters
Volume	145
Issue number	5
DOIs	https://doi.org/10.1007/s10562-015-1507-6
Publication status	Published - 12 Mar 2015

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title = "Enhanced CO and Soot Oxidation Activity over Y-Doped Ceria-Zirconia and Ceria-Lanthana Solid Solutions",

abstract = "Y-doped ceria-zirconia (Ce0.8Zr0.12Y0.08O2-δ, CZY) and ceria-lanthana (Ce0.8La0.12Y0.08O2-δ, CLY) ternary oxide solid solutions were synthesized by a facile coprecipitation method. Structural, textural, redox, and morphological properties of the synthesized samples were investigated by means of X-ray diffraction (XRD), inductively coupled plasma-optical emission spectroscopy (ICP-OES), Raman spectroscopy (RS), UV-visible diffuse reflectance spectroscopy (UV-vis DRS), X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction by hydrogen (H2-TPR), high resolution transmission electron microscopy (HRTEM), and Brunauer-Emmett-Teller surface area (BET SA) techniques. The formation of ternary oxide solid solutions was confirmed from XRD, RS, and UV-vis DRS results. ICP-OES analysis confirmed the elemental composition in the ternary oxide solid solutions. HRTEM images revealed irregular morphology of the samples. RS, UV-vis DRS, and XPS results indicated enhanced oxygen vacancies in the Y doped samples. H2-TPR profiles confirmed a facile reduction of CZY and CLY samples at lower temperatures. BET analysis revealed an enhanced surface area for CZY and CLY samples than the respective CZ and CL undoped mixed oxides. All these factors contributed to a better CO and soot oxidation performance of CZY and CLY samples. Particularly, the CLY sample exhibited highest catalytic activity among the various samples investigated. (Graph Presented).",

keywords = "CO oxidation, Oxygen vacancies, Solid solutions, Soot oxidation, Ternary oxides",

author = "D. Devaiah and T. Tsuzuki and Aniz, {C. U.} and Reddy, {B. M.}",

note = "Publisher Copyright: {\textcopyright} 2015 Springer Science+Business Media New York.",

year = "2015",

month = mar,

day = "12",

doi = "10.1007/s10562-015-1507-6",

language = "English",

volume = "145",

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journal = "Catalysis Letters",

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TY - JOUR

T1 - Enhanced CO and Soot Oxidation Activity over Y-Doped Ceria-Zirconia and Ceria-Lanthana Solid Solutions

AU - Devaiah, D.

AU - Tsuzuki, T.

AU - Aniz, C. U.

AU - Reddy, B. M.

PY - 2015/3/12

Y1 - 2015/3/12

N2 - Y-doped ceria-zirconia (Ce0.8Zr0.12Y0.08O2-δ, CZY) and ceria-lanthana (Ce0.8La0.12Y0.08O2-δ, CLY) ternary oxide solid solutions were synthesized by a facile coprecipitation method. Structural, textural, redox, and morphological properties of the synthesized samples were investigated by means of X-ray diffraction (XRD), inductively coupled plasma-optical emission spectroscopy (ICP-OES), Raman spectroscopy (RS), UV-visible diffuse reflectance spectroscopy (UV-vis DRS), X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction by hydrogen (H2-TPR), high resolution transmission electron microscopy (HRTEM), and Brunauer-Emmett-Teller surface area (BET SA) techniques. The formation of ternary oxide solid solutions was confirmed from XRD, RS, and UV-vis DRS results. ICP-OES analysis confirmed the elemental composition in the ternary oxide solid solutions. HRTEM images revealed irregular morphology of the samples. RS, UV-vis DRS, and XPS results indicated enhanced oxygen vacancies in the Y doped samples. H2-TPR profiles confirmed a facile reduction of CZY and CLY samples at lower temperatures. BET analysis revealed an enhanced surface area for CZY and CLY samples than the respective CZ and CL undoped mixed oxides. All these factors contributed to a better CO and soot oxidation performance of CZY and CLY samples. Particularly, the CLY sample exhibited highest catalytic activity among the various samples investigated. (Graph Presented).

AB - Y-doped ceria-zirconia (Ce0.8Zr0.12Y0.08O2-δ, CZY) and ceria-lanthana (Ce0.8La0.12Y0.08O2-δ, CLY) ternary oxide solid solutions were synthesized by a facile coprecipitation method. Structural, textural, redox, and morphological properties of the synthesized samples were investigated by means of X-ray diffraction (XRD), inductively coupled plasma-optical emission spectroscopy (ICP-OES), Raman spectroscopy (RS), UV-visible diffuse reflectance spectroscopy (UV-vis DRS), X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction by hydrogen (H2-TPR), high resolution transmission electron microscopy (HRTEM), and Brunauer-Emmett-Teller surface area (BET SA) techniques. The formation of ternary oxide solid solutions was confirmed from XRD, RS, and UV-vis DRS results. ICP-OES analysis confirmed the elemental composition in the ternary oxide solid solutions. HRTEM images revealed irregular morphology of the samples. RS, UV-vis DRS, and XPS results indicated enhanced oxygen vacancies in the Y doped samples. H2-TPR profiles confirmed a facile reduction of CZY and CLY samples at lower temperatures. BET analysis revealed an enhanced surface area for CZY and CLY samples than the respective CZ and CL undoped mixed oxides. All these factors contributed to a better CO and soot oxidation performance of CZY and CLY samples. Particularly, the CLY sample exhibited highest catalytic activity among the various samples investigated. (Graph Presented).

KW - CO oxidation

KW - Oxygen vacancies

KW - Solid solutions

KW - Soot oxidation

KW - Ternary oxides

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U2 - 10.1007/s10562-015-1507-6

DO - 10.1007/s10562-015-1507-6

M3 - Article

SN - 1011-372X

VL - 145

SP - 1206

EP - 1216

JO - Catalysis Letters

JF - Catalysis Letters

IS - 5

ER -

Enhanced CO and Soot Oxidation Activity over Y-Doped Ceria-Zirconia and Ceria-Lanthana Solid Solutions

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