A Negative Effect of Niobium-Doped Ceria on Soot Oxidation Activity‡

Sunaina S. Patil; Sahana Naik; Madhura D. Ramesh; Harshini Dasari; Hari Prasad Dasari

doi:10.1002/ceat.202100523

A Negative Effect of Niobium-Doped Ceria on Soot Oxidation Activity^‡

Sunaina S. Patil
, Sahana Naik
, Madhura D. Ramesh
, Harshini Dasari
, Hari Prasad Dasari^*

^*Corresponding author for this work

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

5 Citations (Scopus)

Abstract

Niobium-doped ceria catalysts were synthesized to study soot oxidation activity. X-Ray diffraction (XRD) and Raman analysis of the samples revealed the presence of a fluorite structure of CeO₂ for all the doped samples. The T₅₀ temperature of the pure CeO₂ sample was more significant than that of bare soot. The high catalytic activity of the CeO₂ catalyst can be attributed to the low crystallite size, high facet ratio, and the large Brunauer-Emmett-Teller (BET) surface area as compared to Nb-doped samples. The activation energy calculated by both Ozawa and KAS methods were found to be low for CeO₂ when compared to Nb-doped samples. CeO₂ resulted in better soot oxidation activity with low activation energy.

Original language	English
Pages (from-to)	517-525
Number of pages	9
Journal	Chemical Engineering and Technology
Volume	45
Issue number	3
DOIs	https://doi.org/10.1002/ceat.202100523
Publication status	Published - 03-2022

All Science Journal Classification (ASJC) codes

General Chemistry
General Chemical Engineering
Industrial and Manufacturing Engineering

Access to Document

10.1002/ceat.202100523

Cite this

@article{e749824e81e8402d94c80d3fb2f8ff69,

title = "A Negative Effect of Niobium-Doped Ceria on Soot Oxidation Activity‡",

abstract = "Niobium-doped ceria catalysts were synthesized to study soot oxidation activity. X-Ray diffraction (XRD) and Raman analysis of the samples revealed the presence of a fluorite structure of CeO2 for all the doped samples. The T50 temperature of the pure CeO2 sample was more significant than that of bare soot. The high catalytic activity of the CeO2 catalyst can be attributed to the low crystallite size, high facet ratio, and the large Brunauer-Emmett-Teller (BET) surface area as compared to Nb-doped samples. The activation energy calculated by both Ozawa and KAS methods were found to be low for CeO2 when compared to Nb-doped samples. CeO2 resulted in better soot oxidation activity with low activation energy.",

author = "Patil, \{Sunaina S.\} and Sahana Naik and Ramesh, \{Madhura D.\} and Harshini Dasari and Dasari, \{Hari Prasad\}",

note = "Funding Information: The present work is financially supported by the SERB CRG Project (CRG/2020/000425). The authors would like to thank the Department of Metallurgical and Materials Engineering, NITK, for providing SEM analysis, as well as MRC, MNIT Jaipur, for providing FT Raman data, and MIT, Manipal for XRD analysis. The authors have declared no conflict of interest. Funding Information: The present work is financially supported by the SERB CRG Project (CRG/2020/000425). The authors would like to thank the Department of Metallurgical and Materials Engineering, NITK, for providing SEM analysis, as well as MRC, MNIT Jaipur, for providing FT Raman data, and MIT, Manipal for XRD analysis. Publisher Copyright: {\textcopyright} 2022 Wiley-VCH GmbH",

year = "2022",

month = mar,

doi = "10.1002/ceat.202100523",

language = "English",

volume = "45",

pages = "517--525",

journal = "Chemical Engineering and Technology",

issn = "0930-7516",

publisher = "Wiley-VCH Verlag",

number = "3",

}

TY - JOUR

T1 - A Negative Effect of Niobium-Doped Ceria on Soot Oxidation Activity‡

AU - Patil, Sunaina S.

AU - Naik, Sahana

AU - Ramesh, Madhura D.

AU - Dasari, Harshini

AU - Dasari, Hari Prasad

N1 - Funding Information: The present work is financially supported by the SERB CRG Project (CRG/2020/000425). The authors would like to thank the Department of Metallurgical and Materials Engineering, NITK, for providing SEM analysis, as well as MRC, MNIT Jaipur, for providing FT Raman data, and MIT, Manipal for XRD analysis. The authors have declared no conflict of interest. Funding Information: The present work is financially supported by the SERB CRG Project (CRG/2020/000425). The authors would like to thank the Department of Metallurgical and Materials Engineering, NITK, for providing SEM analysis, as well as MRC, MNIT Jaipur, for providing FT Raman data, and MIT, Manipal for XRD analysis. Publisher Copyright: © 2022 Wiley-VCH GmbH

PY - 2022/3

Y1 - 2022/3

N2 - Niobium-doped ceria catalysts were synthesized to study soot oxidation activity. X-Ray diffraction (XRD) and Raman analysis of the samples revealed the presence of a fluorite structure of CeO2 for all the doped samples. The T50 temperature of the pure CeO2 sample was more significant than that of bare soot. The high catalytic activity of the CeO2 catalyst can be attributed to the low crystallite size, high facet ratio, and the large Brunauer-Emmett-Teller (BET) surface area as compared to Nb-doped samples. The activation energy calculated by both Ozawa and KAS methods were found to be low for CeO2 when compared to Nb-doped samples. CeO2 resulted in better soot oxidation activity with low activation energy.

AB - Niobium-doped ceria catalysts were synthesized to study soot oxidation activity. X-Ray diffraction (XRD) and Raman analysis of the samples revealed the presence of a fluorite structure of CeO2 for all the doped samples. The T50 temperature of the pure CeO2 sample was more significant than that of bare soot. The high catalytic activity of the CeO2 catalyst can be attributed to the low crystallite size, high facet ratio, and the large Brunauer-Emmett-Teller (BET) surface area as compared to Nb-doped samples. The activation energy calculated by both Ozawa and KAS methods were found to be low for CeO2 when compared to Nb-doped samples. CeO2 resulted in better soot oxidation activity with low activation energy.

UR - https://www.scopus.com/pages/publications/85123253935

UR - https://www.scopus.com/pages/publications/85123253935#tab=citedBy

U2 - 10.1002/ceat.202100523

DO - 10.1002/ceat.202100523

M3 - Article

AN - SCOPUS:85123253935

SN - 0930-7516

VL - 45

SP - 517

EP - 525

JO - Chemical Engineering and Technology

JF - Chemical Engineering and Technology

IS - 3

ER -

A Negative Effect of Niobium-Doped Ceria on Soot Oxidation Activity^‡

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this