Mn-doped Ceria Solid Solutions for CO Oxidation at Lower Temperatures

Perala Venkataswamy; Deshetti Jampaiah; Deboshree Mukherjee; C. U. Aniz; Benjaram M. Reddy

doi:10.1007/s10562-016-1811-9

Mn-doped Ceria Solid Solutions for CO Oxidation at Lower Temperatures

Perala Venkataswamy
, Deshetti Jampaiah
, Deboshree Mukherjee
, C. U. Aniz
, Benjaram M. Reddy^*

^*Corresponding author for this work

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

44 Scopus citations

Abstract

Abstract: In this investigation, Mn-doped CeO₂(CM) catalysts were prepared by co-precipitation (CP), sol-gel (SG), and hydrothermal (HT) methods and characterized by XRD, ICP-OES, N₂ adsorption–desorption, SEM, TEM-HREM, Raman, XPS, FT-IR, XPS and H₂-TPR techniques, and evaluated for CO oxidation activity. The CM catalyst obtained by HT method showed superior CO oxidation performance at much lower temperature (T₅₀ = ~355 K). The better performance of CM-HT catalyst is ascribed to its larger surface area, higher concentration of surface adsorbed oxygen, enhanced reducibility, and more oxygen vacancy sites. Further, it was found that the CM-HT catalyst is fully recyclable for over four runs while maintaining its high activity, which suggests that it is a better catalyst for CO oxidation at lower temperatures. Graphical Abstract: [Figure not available: see fulltext.]

Original language	English
Pages (from-to)	2105-2118
Number of pages	14
Journal	Catalysis Letters
Volume	146
Issue number	10
DOIs	https://doi.org/10.1007/s10562-016-1811-9
State	Published - 1 Oct 2016
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2016, Springer Science+Business Media New York.

Keywords

CO oxidation
CeO
CeO-MnO
Co-precipitation
Hydrothermal
Oxygen vacancy
Sol–gel

ASJC Scopus subject areas

Catalysis
General Chemistry

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Cite this

@article{c780c9cb048f4f33b66537a0add3a06f,

title = "Mn-doped Ceria Solid Solutions for CO Oxidation at Lower Temperatures",

abstract = "Abstract: In this investigation, Mn-doped CeO2(CM) catalysts were prepared by co-precipitation (CP), sol-gel (SG), and hydrothermal (HT) methods and characterized by XRD, ICP-OES, N2 adsorption–desorption, SEM, TEM-HREM, Raman, XPS, FT-IR, XPS and H2-TPR techniques, and evaluated for CO oxidation activity. The CM catalyst obtained by HT method showed superior CO oxidation performance at much lower temperature (T50 = \textasciitilde{}355 K). The better performance of CM-HT catalyst is ascribed to its larger surface area, higher concentration of surface adsorbed oxygen, enhanced reducibility, and more oxygen vacancy sites. Further, it was found that the CM-HT catalyst is fully recyclable for over four runs while maintaining its high activity, which suggests that it is a better catalyst for CO oxidation at lower temperatures. Graphical Abstract: [Figure not available: see fulltext.]",

keywords = "CO oxidation, CeO, CeO-MnO, Co-precipitation, Hydrothermal, Oxygen vacancy, Sol–gel",

author = "Perala Venkataswamy and Deshetti Jampaiah and Deboshree Mukherjee and Aniz, \{C. U.\} and Reddy, \{Benjaram M.\}",

note = "Publisher Copyright: {\textcopyright} 2016, Springer Science+Business Media New York.",

year = "2016",

month = oct,

day = "1",

doi = "10.1007/s10562-016-1811-9",

language = "English",

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journal = "Catalysis Letters",

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TY - JOUR

T1 - Mn-doped Ceria Solid Solutions for CO Oxidation at Lower Temperatures

AU - Venkataswamy, Perala

AU - Jampaiah, Deshetti

AU - Mukherjee, Deboshree

AU - Aniz, C. U.

AU - Reddy, Benjaram M.

PY - 2016/10/1

Y1 - 2016/10/1

N2 - Abstract: In this investigation, Mn-doped CeO2(CM) catalysts were prepared by co-precipitation (CP), sol-gel (SG), and hydrothermal (HT) methods and characterized by XRD, ICP-OES, N2 adsorption–desorption, SEM, TEM-HREM, Raman, XPS, FT-IR, XPS and H2-TPR techniques, and evaluated for CO oxidation activity. The CM catalyst obtained by HT method showed superior CO oxidation performance at much lower temperature (T50 = ~355 K). The better performance of CM-HT catalyst is ascribed to its larger surface area, higher concentration of surface adsorbed oxygen, enhanced reducibility, and more oxygen vacancy sites. Further, it was found that the CM-HT catalyst is fully recyclable for over four runs while maintaining its high activity, which suggests that it is a better catalyst for CO oxidation at lower temperatures. Graphical Abstract: [Figure not available: see fulltext.]

AB - Abstract: In this investigation, Mn-doped CeO2(CM) catalysts were prepared by co-precipitation (CP), sol-gel (SG), and hydrothermal (HT) methods and characterized by XRD, ICP-OES, N2 adsorption–desorption, SEM, TEM-HREM, Raman, XPS, FT-IR, XPS and H2-TPR techniques, and evaluated for CO oxidation activity. The CM catalyst obtained by HT method showed superior CO oxidation performance at much lower temperature (T50 = ~355 K). The better performance of CM-HT catalyst is ascribed to its larger surface area, higher concentration of surface adsorbed oxygen, enhanced reducibility, and more oxygen vacancy sites. Further, it was found that the CM-HT catalyst is fully recyclable for over four runs while maintaining its high activity, which suggests that it is a better catalyst for CO oxidation at lower temperatures. Graphical Abstract: [Figure not available: see fulltext.]

KW - CO oxidation

KW - CeO

KW - CeO-MnO

KW - Co-precipitation

KW - Hydrothermal

KW - Oxygen vacancy

KW - Sol–gel

UR - https://www.scopus.com/pages/publications/84991071708

U2 - 10.1007/s10562-016-1811-9

DO - 10.1007/s10562-016-1811-9

M3 - Article

AN - SCOPUS:84991071708

SN - 1011-372X

VL - 146

SP - 2105

EP - 2118

JO - Catalysis Letters

JF - Catalysis Letters

IS - 10

ER -

Mn-doped Ceria Solid Solutions for CO Oxidation at Lower Temperatures

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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